All these comments are really interesting, I've been tempted for a while but that £11.99 is a hard sell just to remove ads. I'd be more inclined if I was interested in the background play, downloads or YouTube Music but I just feel like I'd be paying for features I'm never going to use.
I would much prefer to be paying half the price for
just the ad-free aspect, but they of course choose to bundle it with things I don't care about (YouTube Music and such). But I justified it by realizing that, in a given week, I ended up watching perhaps as much YouTube content as I did, say, Disney+. I'm fine with paying for Disney+, why was I subjecting myself to ads on YouTube? Now that I have it (I subscribed, oh, something over a year ago), it'd be very hard to go back. The only times my TV shows me actual ads are on the rare occasions that I watch broadcast TV (like watching SNL occasionally, or, say, the SuperBowl - most of my life I had some familiarity with the then-current crop of TV ads - I still know kids cereal jingles from when I was a kid - but since "cutting the cord" years ago, now it's all pretty foreign to me).
There are still a few channels on YouTube that I watch that do paid promotions (basically, them personally pitching Audible or whatever in the middle of one of their videos), which can be annoying, but since that's entirely within their normal video stream, and not something controlled by YouTube, nothing is stopping me from skipping forward 30/60/whatever seconds to get past it (they nearly all put up a banner with a URL and promo code at the end, easy enough to spot, if still annoying). There's one channel (ScreenCrush) where he tries to slyly/cutely segue in from his actual content to the promo ("yes, Thor loves his long golden hair, and if you love your hair too, you should totally get these <dubious hair pills I'm pitching this week>"), which I find quite annoying (dammit, stop that, it's like you decided to lie for 10 seconds in the middle of your interesting content to trick us into watching your ad, just be honest and say, "and now a word from this week's sponsor" like others do), but it's a love/hate thing - after I watch the latest episode of Obi-Wan or whatever, I like to watch the corresponding ScreenCrush episode, because he brings up interesting connections and backstory and "things you might have missed" - he does a good job of it and I find those insightful and entertaining. I wish the channels that did paid promos like this would switch to using the YouTube ads (which go entirely away) instead, but that comes down to the decisions of the individual YouTuber rather than YouTube itself, so you have to decide whether you care on a case-by-case basis. In any case, that only affects a handful of channels that I sometimes watch - the rest are entirely just content with no ads or promos.
In any case, I believe YouTube has a free trial - you could try it for a week or whatever and see what you think.