If that’s the issue, why it doesn’t happen with all other flatpaks?
Nothing special, I don’t think that’s the problem since the lag is at every launch and it takes something like a minute to appear.
Yes, I’ve tried pretty much everything. Strawberry is pretty good but it doesn’t have a grid view for albums, it also shows the contents in a way that is not very intuitive imo (I want albums in publication order with original release date). I sincerely expect something new from the next Amarok in terms of intuitiveness of use, I hope the good man who is bringing it back wants to innovate something in this sense.
QuodLibet: I’m waiting for Amarok 3 to be ported but right now this is the best music collector/player in my experience.
Ardour is the most complete and professional DAW in my experience, Zrythm looks promising.
A simple text editor does the job on PC, I use kate (kde) but perhaps a markdown editor might be better.
Syncthing + your text editor (orgzly revived is great)
There’s a desktop app: https://simplex.chat/downloads/#desktop-app
Every racing game not trying to sim stupid cars is gold these days.