Now, there's an understatement! 100% agreed on that one. And I'm 70 and think that despite my best efforts, I only learned about 10% of what I really wish I could have.
Granted that that applies to everything.
Agreed also on that last, except it would depend on who was doing the remastering (or re-recording, which may be what you really mean), and their purpose. Most remasters of rock, pop, country, etc., actually got worse in many respects. Have you ever checked out the Dynamic Range Database at dr.loudness-war.info?
Of course, dynamic range isn't "everything". Not by a long shot. But, I've had fairly good luck with buying CD's that rate highly on that website. Very often they are overseas releases.
All true! I remember when I was a kid a friend’s dad had a “classic Hi Fi set”. It was LOUD, it had four speakers, and each output had it’s own “tone control”. But it was MONO! It wasn’t even stereo output. lol
But it was made for when 78s and 45s were all recorded in mono. Pretty hard to do much with it digitally so there is sometimes a limit to what can be fixed.