Has a lot of old school hot rodding been lost?

Full disclosure. I grew up in a family shop that had been building race cars and hot rods since the model A up hrough racing on the beach at daytona and drag cars in the 70's and hot tords in the 80's. It was old school (outdated) by the time I came along I was exposed to a lot of things people thought was nuts even in the lat 80's early 90's so my perspective is probably skewed.

But I was thinking about how a lot of the things that my grandad and great grandad did are lost due to a bunch of reasons.
I mean who re-arches leaf springs with an anvil and a hammer? Who builds slant sixes for a dirt track car? Who has factory crank counterweights machined down and knife edged anymore? Who modifies a chassis to use two different length torsion bars on a dirt car? Who the hell hotrods old Plymouth flatheads?
A lot of these practices are lost dues to better options now days and many due to it being more cost effective to just buy a crank or a cylinder head than spend the man hours or machine shop bill necessary.
But as I look around the world is changing. Things that were cheap and readily available a couple years ago are hard to come by and suspect quality now. I'm finding myself out of necessity dipping back into some of the things I learned as a kid. Hell Im planning to weld a carb flange into a jeep efi Intake. Something I never would have considered had I not seen it as kid.

Are any of you experiencing this? Or I am I just maybe overly nostalgic?
Are these kind of things being lost to time?
You might as well as why they didn't do LS and Gen III Hemi swaps back in the day, because the answer is the same.