A vast change in sounds of earlier arrangers to current models... and I don't mean, in a good way

Take a Korg PA1x or maybe a PA2x, and compare to the PA series today.

Take a Roland G70 , and compare it to BK's or E-A7..

The older models have a more analog feel to them, more punch, not as thin sounding as the newer models..

There may be many reasons but my guess would be the samples themselves, but mostly ac/dc converters were of better quality on flagship models of yesteryear.

I have had the chance to compare the above often, and know there is a difference.

What do you folks that have owned both think?