I don't know anybody who has really used the induction heaters everybody in the garage trade bought into.
When I had the alignment done on my D3 I was chatting to the guy that did it because I was interested how they get on with ones that are all seized up IE most of them. They use an induction heater and he said it never fails to free up the bolts.
One of things they look ideal for are things like anti roll bar links that have rusted nylocs. Melts the plastic out/frees the nut without burning everything.
I've seen a Youtuber painting bolts with VHT paint then using the induction heater to cure them. Worked really well
Certainly on my wish list.