I rebuild them to standard.
Worked well enough back in the day and work well when rebuilt but will obviously not have the same action as modern shocks.
If you want originality get them restored. If you want whizz bang buy new ones.
In the late 70s and 80s when I rode harder and faster than I do now it was on Cerianis, Marzocchis, Pirelli Phantoms and even Avon Roadrunners.
Now on POP I have BT016 Pro, Maxton and Wilbers, GSXR wheels and discs, 4 pot calipers and so on. The bike is technically far removed from my early Laverdas, and yet I didn't need all that stuff to go fast then.
Why do we upgrade? Because we can not because we HAVE to.