> Personally I use FLAC for archiving purposes, to preserve a copy of my physical CDs.

Same, but at home I also play directly the FLAC files (laptop / DAC / amp / floorstanding loudspeakers). They're not that much bigger than 320 kbps mp3 files.

I convert to lossy for my car, which takes mp3 files but not FLAC.

I used to collect mp3s back in the Napster days. My HDD was maybe 40 GB back then (?), maybe not even that. Nowadays FLAC files size aren't a concern. I think a screenshot of my screen takes more room than a song FLAC encoded.