I guess it depends on the type of music one listens to. I prefer electronic music so I choose components that excel in that area. As the synthesiser is a relatively modern invention a lot of classic gear will have been designed and built before its advent so couldn't possibly be tested and tweaked with it in mind. Obviously it doesn't mean that classic components won't be able to cut it, but I find the more modern and 'cold' equipment to have a much stronger grip on that ilk on music.
However, on the plus side; one is likely to get some great sounding units for pocket change as a lot fall into the trap of thinking that 'new is better' (rather than just more appropriate) and consequently pass very high quality components on for little money. Having said that people are a lot wiser these days in terms of valuation - the internet, particularly ebay has shown people that certain items are very popular and resultantly have high value, Audiolab being a prime example - the 8000As still go for absurd money.
I guess there's a lot to be said for classics, Comby's B&W electrostats are a prime example of a desirable classic that will show a modern equivalent a clean pair of heels.
Ben Duncan mains conditioner
2022 MacBook Pro 14" M1 Pro 10/16/16/16
Samsung QE75Q90T 75" QLED TV
XMOS DSD Async USB to Coax converter
RME Audio ADI-2 FS (AK4493) DAC
Chord Clearway XLR interconnects
Audioquest Crimson USB interconnect
QED Quartz Reference optical interconnect
Edifier S3000 Pro active speakers
Atacama SE24 stands