Can a .m4a audio file be converted into a .mp3 one losslessly?

On 04 Apr 2019, "J. P. Gilliver (John)" wrote
in microsoft.public.windowsxp.general:

FLAC natively supports information tags that can be read by any
player that plays FLACS

That sounds rather obvious (-:

Not necessarily so obvious. In my experience, most destructive audio
editors will discard or corrupt FLAC metadata when resaving, so it's
better to work on uncompressed files. Plus the speed-of-opening factor.

Remember one of the 'groups this thread is going to is the XP one,
and the other is the 7 one!

I've been using FLAC files extensively for many years, mostly on my old
XP machine. It's never been an issue for me.

WAV for editing.
FLAC for archiving.
MP3 for portable players and non-critical listening.