I have a few nostalgic components myself, including a 486DX-33 chip. It probably still works, but the motherboard it came with (in my dearly departed first PC, a Quantex) is long gone; the soldered-on CMOS battery finally cracked open and corroded the mobo.
I'm probably the only fool I know that paid near full price for a Pentium-83 Overdrive chip to upgrade the DX-33. Talk about too much buck and not enough bang! I could have upgraded to a DX4-100 for cheaper, but there was some game that I was wanting to run that required a chip that identified itself as a Pentium. It's now mounted in an old AST Advantage 575 that, last I knew, still runs. I haven't fired it up in a while; maybe I should.
ADDENDUM: ...Well, whaddaya know, the old AST still boots! Time for some oldskool DOOM! 😀