The useless tools might have been a treasure trove to the right person.
I'd love to go through all those "useless" tools.
Oh no, Dad's old all-steel table saw that was designed and built to be repaired, and which has the same tolerances as a "precision tool" today, doesn't have bluetooth to pair with your iPhone? Guess you'll just have to toss it, then.
Although a riving knife — which I wish that I had known about when I was younger - shouldn’t be that hard to add.
A riving knife that doesn't go up and down with the blade is just a pain in the ass that gets removed the first time you aren't making a through cut and rarely gets reinstalled.
[0] https://m.youtube.com/watch?v=4CuchotcM_4 If you've never seen the inside of a Unisaw, there's a lot of parts in that video that weren't there when the saw left the Delta factory. Even if you mass-produced a kit, it would require reworking some of the original parts, possibly at machinist level tolerances.
They're useful for very exact/delicate work, quiet drilling, and for getting into awkward places where an electric drill doesn't fit.