with-emacs.sh VS bufler.el

Well, this is impossible to test if you don't say on what version of Emacs you're experiencing this. You could test if it is your configuration by using the lovely with-emacs script to sandbox.

Check out https://github.com/alphapapa/with-emacs.sh

FWIW, I would generally recommend using with-emacs.sh rather than chemacs2, because it's much simpler to use: https://github.com/alphapapa/with-emacs.sh

Whenever you encounter weird behavior, you should try to reproduce it in a clean Emacs config. This script makes that easy: https://github.com/alphapapa/with-emacs.sh

Not to poach, but you might try this alternative: https://github.com/alphapapa/with-emacs.sh

Wow, finally! And just when I've gotten the bugs ironed out of with-emacs.sh and makem.sh related to Emacs 28's changes. Well, pre-29 versions will still be around for a long time, so with-emacs.sh will remain useful, but it will be nice to have support for this integrated into Emacs.

Sure, but you don't have to throw away your old, comfortable, known-good config to try a new one. Use with-emacs.sh to run as many Emacs configs as you like.

And about 20 minutes later (native comp with full AOT takes a while), I could just run emacs-28.0.60 (or with my script, with-emacs.sh -e emacs-28.0.60 -d ~/src/emacs/configs/ap.el).

No problem, I know that time is limited. There have already been a couple of issues filed about TRAMP, e.g. https://github.com/alphapapa/bufler.el/issues/63 If you last tried Bufler before those issues were filed, maybe give it another try; otherwise, please do chime in on that one when you get a chance.

The package I've written that provides tools for grouping buffers into something like "workspaces" would be Bufler: https://github.com/alphapapa/bufler.el See bufler-workspace-mode. It has many more features which are described in its readme.

What are you trying to convince me about? :D :D :D. To start with I recommended to you to use ibuffer, and I can recommend you even to check up Bufler if you are heavy ibuffer user.

Bufler has a lot of options in how to group buffers: https://github.com/alphapapa/bufler.el

Others have mentioned the awesome projectile, but I think it should be said that Emacs now has built in project.el which has come in leaps and bounds (though probably still lacks some projectile features).

I use project.el alongside consult[1] which has many convenient wrapper functions over built-in ones, like an enhanced `switch-to-buffer` with project support. I am actually using an even tighter integration called consult-project-extra[2].

The most advanced and overkill solution would probably be to use bufler.el[3] which basically allows you to define your custom logic for buffer grouping.

[1] https://github.com/minad/consult

[2] https://github.com/Qkessler/consult-project-extra

[3] https://github.com/alphapapa/bufler.el

It's not designed to work that way, but it's theoretically possible. Especially, when I refactor parts of Bufler to use Taxy, it will be easy to make certain grouping keys non-consuming. See https://github.com/alphapapa/bufler.el/issues/69

Regarding the buffer-switching part of this package, you might look at https://github.com/alphapapa/bufler.el and consider how you could implement it through Bufler.

See also https://github.com/alphapapa/bufler.el Its readme also links to related projects.