I love pine64 but I'm sorry; the idea of a soldering iron having a CPU in it is inherently hilarious.
https://pine64.com/product/pinecil-smart-mini-portable-soldering-iron/?v=0446c16e2e66
"bro how fast is your soldering iron bro? check out how much cache mine has!"
"dude I'm gonna overclock my soldering iron. what's the worst that can happen, overheating? that's literally the entire point of a soldering iron."
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@technomancy I can totally see the utility in throwing a tiny MCU into a soldering iron for temperature control, but even 1MHz seems like it ought to be more than enough for that. You don't need much to run a PID loop.
@neal somebody sell me a soldering iron with a 6502 in it!