KDE let's you do that first one, though it's ctrl+super. It's one of my favourite lesser known features.
kmacmartin
Steam Deck compatibility has a much higher standard since it requires the performance being good, gamepad support, etc, and even that's at 40%. General Linux can't be less than 95% for games that don't require kernel level anticheat. Try checking a random sampling on https://www.protondb.com/.
To add to this, if the phantom clicks are indeed primarily happening while typing or otherwise moving your hands near the touchpad, you should check to see if tap to click is enabled. The unintentional clicks that feature produces drives me crazy and I have no idea why it's always on by default when a physical click or button is always available.
Not the OP, but connect a computer to it and set it to turn on to the last input. I've had one for a year and can't even remember what their interface looks like.
I've been using gimp's 3.x branch since 2016 or so (after getting a hidpi display) and gimp itself since the early 2000s, both for personal stuff and for work. I'm typically editing existing photos and images to clean them up, apply effects, make new clean images from pieces of existing ones, etc, and for my uses it's great. Also, having been using it for so long, I actually really prefer the ux to Photoshop (especially since they added an option to use it in single window mode).
I've seen videos showing some of the features it's missing for certain types of things though, and while there are hacky scripted ways to emulate them, you might find it lacking if you're expecting those particular features.
I'd recommend looking up tutorials on YouTube for things you frequently do and see how much work it is and what the final product looks like. You could up the playback speed to save time since you won't be following along with gimp yourself.
I run two multimonitor systems with different DPIs and 2.5gbe and they both run great. What issues are you hitting?
Because they only offer open source apps they build themselves
You can also use weechat as a bouncer, and it works even better with its own clients which can sync chat history rather than receiving it in a dump. The android client is fantastic in that respect.
The plugin ecosystem is also great. I have a plugin that pushes notifications for PMs and mentions to my gotify server, alerting me on my phone without having to drain its batteries staying connected.
konsole does support sixel images
I have an old phone with microg, slack, tasker and termux running on it. When slack receives a push notification, tasker pulls it out and sends it to a script in termux that forwards it to my gotify server, which my main phone is listening for notifications on.
I've emailed Slack a bunch of times asking for unified push or even just an API route I can listen on, but so far I've had no luck.