While technically POSSIBLE, how viable is it to run Adobe apps, especially Premiere and After Effects, on Linux
I'm keeping it broad by not specifying a distro. I'm just curious is this a real option for actual editing professionals? As far as I understand you can make it work by running under Wine, but I'm guessing this comes with significant drawbacks. I'm having trouble finding any information on both the current state of things with running Premiere under linux (most info seems to be from 2018 for some reason), and the extent of the drawbacks in a quantifiable way.
I'm generally a pretty happy Mac OS user, but I always want to keep options open. I haven't really tried to use Linux on desktop since the late 00s.
The reason, you aren't finding anything, is that nobody really attempts to install premiere or after effects anymore on Linux. The alternatives have cought up and they are available for Linux.
DaVinci Resolve provides the complete package. Video editor and (node based) compositor in one. Even outside of the Linux world there is a lot of momentum behind this tool, as I probably don't have to tell you. Keep in mind, that the free version on Linux has some limitations, that the free versions on the other OS's don't have (missing h264 support for example)
Left angle Autograph (https://www.left-angle.com/#page=95) is a young product, having seen its first release earlier this year. It's a direct competitor to After Effects. A timeline based VFX tool. Unfortunately fairly expensive as well.
Back to your question: making things work with wine has a significant drawback. Your system can break with every update. So you're not making it work just once but over and over again.
Someone should tell Left Angle that Ubuntu 22 is not a valid Ubuntu release.
It always infuriates me a bit whenever I see that and it immediately tells me that Linux doesn't seem to be a priority for them. For some reason they get the macOS version numbers right ...
GIMP is currently missing non-destructive editing (a rather core feature), but that's something they're aiming to fix in 3.2. I don't know when that'll be here, but that will be a good day for GIMP.
I personally use Affinity Photo on macOS and I'm really happy with it. I like it more than Photoshop, actually. Fair warning that it will rasterize all your text layers in .PSD files, so you'd want to be using only .afphoto files, but it's impressive how good the .PSD support is otherwise. So, give it a year or two, and Affinity Photo might be in good shape in Wine! I mean, I can hope.
Extremely laggy as PWA in chromium, less laggy in chrome and has to be used in a normal browser window in firefox
Doesn't work if I'm not connected to the internet and also ads taking up ~10-15% of the window
When it's working in firefox it seems like a decent alternative and even supports opening psds which is incredibly useful but not sure I'd want to run it in a browser, if it was open source could shove it in an electron wrapper and be done with it but doesn't seem to be, their public GitHub only has branding and information
Honestly, no there isn't. Even if Gimp can apparently do a lot of what Photoshop can, you have to first learn, then jump through 20 unintuitive hoops to get to the same result thst Photoshop can do in 2 clicks. Nothing compares as far as I'm concerned.
I'm not sure there is really anything else like that on Linux though on a more positive note.
Most other tools I've ever had to interact with either have native support, run perfectly/very well with wine or have a good/better alternative on linux