I see, so the Rev2 has analog elements (Filter, VCA etc).
Any analog elements will age with time, capacitors within the Rev2 included - and this may affect sound down the line (not necessarily for the better though).
The way electronic components age to my understanding is also dependent on environmental factors, so not all aging is equal. In general, I would say that the effect of aging capacitors on sound would be cumulative at best. ie, a single capacitor that drifts out of tolerance may not have an effect at all. But I’m mostly clueless on this, so big fat grain of salt added here. 
I also read somewhere that what affects sound in vintage synths more than anything are changes in the biasing of their transistor circuits over time (ie changes in resistance, leakage etc).
So my take would be, your Rev2 is a lovely synth that is massively enjoyable and desirable today already, if people were to go nuts for its sound in 20 years time due to the way age affected it, I’d say that would be more due to psychoacoustics & nostalgia than to actual variances in aged components