I think it’s really pretty cool what can be done for a fraction of cost of reproducing the original silicon.
@tomrk
Yes - and it shows once again that when demand exists, someone will step up.
As you mentioned, old, hard-to-find SIL opamps can be replaced with tiny adapter PCBs on which you can solder any modern, 90-cent opamp that is not only widely available but has far better specs than the original.
An open-hardware project on DIYAudio lets you replace the notorious STK power modules - the bane of classic 70s receivers - with compatible amp boards populated with proper discrete components, ensuring those silver-faced beauties stay with us another 50 years.
The one thing that’s not being replaced fast enough is competent techs. But, the runaway success of the aforementioned diyaudio.com and of countless other DIY sites shows that increasing numbers of folks - including yours truly - are taking things into our own hands.
The impetus for starting this thread was the realization that my system, humble as it is, outperformed (sounded, to my ears, better than) a $80K new, Wilson Audio-based system.
I also said my system cost me $2,300, but in the interest of full disclosure it took me a considerable amount of time to repair or restore non-functioning components bought at a very steep discount. If I’d had to farm out the work at $100 / hr, my cost would be an order of magnitude higher.
I recommend audiophiles learn to service and repair their own gear, time permitting. It’s fun, it’s empowering, and it’ll save you tons of money!