I like to compare Mech mods to Standard transmission cars, there are those still that seek out and prefer to drive a standard shift car, because the experience feels more connected and they're more efficient with less complicated electrical components to go wrong, driving an automatic is immensely boring to me, which is how I imagine VV/VW/TC must be.
Though, you could also compare mech mods to the old rotary dial phones, yes there may be new and advanced technology out there but my grandparents still have a working rotary dial phone from the 60's, and it's their only phone in the house. Does it work? yeah it sure does, does it take a little longer to dial the number? Sure...but it has reliably worked for over 40 years... do you know how many cellphones it would take to reliably last 40 years...
Mechanicals may never be the most popular, but they will ALWAYS have a following. You pick them up and they work, no waiting for a screen to come on to check specs, no fancy buttons or circuit boards and the form factor is the smallest for 18650 battery size.