What uses 5 GB in idle— The GPU or "Wired memory"?
I'm attaching a screenshot of Activity Monitor. Its my M2 Air connected to a 4K display and I'm only using 2 GB of Wired Memory. That includes GPU usage for normal windowing.
I'm attaching a GPU chart from the app iStatistica Pro. It shows me using the GPU by using Mission Control and switching Spaces. So normally the GPU is using about 300 MB but you'll see in the second screenshot it spikes up to about 1.3 GB. So thats about as much GPU memory people will use until they play games or something.
During the GPU spike, the "Wired memory" went up to almost 3 GB so I'm confident Wired Memory includes GPU memory. Anytime I used GPU more, wired memory went up the same as iStatistica Pro was showing.
So lets say 2 GB for macOS and GPU normally—which goes up to 3 GB total—leaves 5-6 GB of available memory. If each tab is 200 MB average, thats 25-30 tabs. The thing is, reddit posts will take like 60 MB, but a YouTube video can take 300 MB, so milage will vary. Plus there is compression and swap to buffer, so its not like someone can't pull up 50 tabs on their 8 GB Mac.
All I want to do is illustrate that the truth is in the middle—8 GB RAM isn't a lot but its also not "10 tabs" bad. I'm pretty sure 8 GB Macs can open 50 tabs no problem. Now, do they open 50 tabs + a bunch of other apps simultaneously? That can be a problem. Thats why Apple needs to increase default RAM. Nobody should be paying more than $600 for a Mac with only 8 GB RAM. Its too low in year 2024. Raspberry Pi 5 comes with 8 GB LPDDR5 and that only costs $80 for the entire kit which includes 8 GB RAM.
I had a similar conversation last week in the M3 Air announcement thread, and at the time I realized I had 20 Chrome windows open with over 20 tabs each, as well as Safari in the background, so I would have to say that 50 tabs does seem possible. Yes, I have been doing this so long that everything current seems relatively quick, and I am also able to use a base Surface Go that has only 4 GB RAM while only slightly grumbling, but my base 2018 Intel MacBook Air seems slow to me, while my base M1 Air still feels fast enough that I am using it right now even though I have a MacBook Pro M1 Pro with 16GB that I could be using. Yes, I wish Apple would include 16/512 for no extra charge, but considering you can still buy the Surface Go 3 from Microsoft with 4 GB RAM that is not upgradable, I find it strange all the surprise that Apple doesn't include 16GB without paying the usual Apple upgrade price. It would be great to see Apple lead the pack with more RAM and storage for less, but it certainly isn't the norm.
The funny thing is that I was looking at another post about how 8 GB is too small to do anything, and just thinking about posting my crusty old man response about kids nowadays. For context, I'm with you that it would be nice if they just moved to 16 GB, and I had quit buying new Macs after 2012 when they started limiting user upgrades and just kept upgrading my 2011 mini and MacBook Pro, which both still work fine. I finally bought a base 2018 Air refurb, which was functional, but probably no faster (likely slower) than my 2011 MBP with the 16 GB I installed. When the M1 Air came out, I was actually intrigued enough to buy new, but still just bought a base 8 GB / 256 GB SSD, as I figured that since it was non-upgradable, I would just buy bottom end and replace more often (because I'm a packrat collector and keep old computers, I don't want to call it disposable). I was surprised how useable it was. I am typing this on that machine now, and just checked and I have 20 Chrome windows open with about 24 tabs each. I've got Remote Desktop in the background controlling my mini, Mail, Messages, Activity Monitor, and Preview are open. I forgot and left Safari open with multiple windows. Basically, this thing is so much better than I expected that I have gotten sloppy and just leave crap open that I would have always just closed in the past before moving to other tasks, though I do usually close things if I am opening Final Cut or Logic, but don't when I use Handbrake. I was so impressed I ended up getting an M1 Pro MacBook, but I still just use this Air for day to day because it works so well, even with 8 GB. I admit I am probably biased because my first computer had 1KB and rendering one raytraced frame at 320x240 used to take me 24 hours on my Amiga 2000, but the base Air is freakishly capable in my personal experience.