Don't you (and others) think that if a minor mod made a significant improvement, wouldn't the manufacturer have made that mod themselves?
I modded my sotm because that is exactly what sotm did to move to the 'Neo' version of my streamer. I never mess with 'new' kit usually but I did in this instance, and an improvement was wrought - for the price a larger capacitor.
And I have to say if I hadn't recapped my speakers I probably wouldn't still have them - tho a couple were seriously out of spec. The improvement was striking.
Would I spend £1.5k on modding a new disc player? No, I'd buy a better one.
IMO modding doesnt have to be about serious circuit changes like the RA. I'm not sure whether or not replacing speaker caps have affected the value, but I'm very happy with them and have no thoughts of selling, the same goes for my streamer.
I'm not much of a box swapper - I've reached a point where good enough is exactly that. And that has been reached by some targeted fettling.
Oh, I also have a bastards bastard of a turntable. That sounds pretty good, tho' is probably worth much less than unmolested - but see 'good enough'.
If I'd implemented my system improvements by buying new kit every time it would have cost money I didn't have and would've been a true faff.
More faff than getting the soldering iron hot. 😁
Thanks to my, mostly modest, mods I have a much
improved system and one I'm very happy with.
Maybe I should get a RA catalogue......