Apple doesn't make key features optional. They either support it all the way or they will phase it out. If only some devices have it, then developers won't fully support it which will make for a suboptimal user experience.
The iMac, Macook Air, Mac Mini, and Mac Pro don't have it. You can't buy an external keyboard with it. Only the 13" Pro and 16" Pro have it. Support for the toucbar is inconsistent. This was the case with 3D touch as well. Eventually, 3D touch was phased out.
Don't necessarily agree on their reasoning for introducing it, and I also was one of the haters from the start - primarily in knowing it added cost for something I don't want, need or use, and worse - negatively impacted my workflows without a physical ESC key. I'm sure it was one of Ives' 'last bangs' in making a mediocrity of the entire 2016-2018/9 lineup with the 'bravery' of removing all ports, while thinner devices such as surface books could still manage an HDMI connector, etc.
I doubt the new ARM 'macbook' will have it at launch, regardless of it's final disposition - the Air and iMacs don't, and I'd expect their first offering to be a MacBook Air. Getting Pros to move, unless they are having a TON of developer conversation in the background, will be a longer haul prospect. Even with emulation of x86 - many of us have specific needs and software stacks, even before we get to the use of VMs (x86-based, of course). Yes, some of us 'could' run ARM distress of Linux in the VMs, but Win10? We're running VMs collectively for development and research/R&D purposes, as well as for when there's a lack in Mac software in some cases, so making that lack of software
grow even further might be a death knell for some 'pros' leaving the platform.
I'm unsure where this winds up - an ARM MacBook air and lower end models makes a lot of sense, where it's typical office applications or web-based apps.. could suffice easily for a fair sized group of people, but then again - this also likely is a pretty high intersection of those able to use an iPad as a 'replacement laptop,' outside of creatives at least where the iPad/pencil input is mandatory for them. Once you move to the other 'pro' users - things get rougher. Maybe the top end pros will cut a deal with either AMD or Intel and provide a native x86 CPU as a co-processor dedicate to running x86 programs. That's not a great $ proposition but it's also possible 'sell a good # guaranteed at a lower cost, or sell nothing' is being discussed if being looked at. Of course, this would require a fair amount hardware and OS rework - and wouldn't be anyone's first choice when hit with 'let's build an ARM laptop!', but it may be forced, unless the ARM chips are specifically engineered to be more efficient at x86 emulation - but this may be no small task, as RICS (ARM) vs CISC(x86) and their general thermal efficiencies are very different. Note - it's entirely possible I'm off on this, as I used to be a lot deeper into CPU and system architectures, but it's not something I have spare time to keep up on anymore, but the end result and problem remains - many 'typical' users won't be impacted much by the move to ARM, and might even appreciate e.g. a 24 hour battery life, but a good portion of 'pro level' users/buyers - depend directly in some fashion on x86, including the usage of VMs.
I do recall the move from PPC to x86, and it was painful and caused uproar by many, but in reality PPC mac users didn't really have the option of spinning up x86 VMs to continue to improve their capability 'on a single system' - there was some emulation, but slow and not akin to the many of us running VirtualBox, Fusion, etc. today on Macs on x86. As a result, those 'pros' requiring that either need to be addressed in a sane (i.e. not a Johnny Ive brushoff nonsense about 'bravery' ) fashion, but one that allows us to continue at least at the levels of productivity we're at today, which includes x86-based VMs.
Should get interesting. Depending on how it goes, expect MANY MR users and Apple fanboys to go on telling some of us how we don't 'need' x86 VMs, just like 'none of you need 32/64GB on a MacBook pro' and other fun. For Apple's sake, I hope they do a well-planned, slow roll transition, and don't ignore those with specific needs in the 'pro' category.