How Bulletproof is the 13N10 Power MOSFET ??

I have a lot of CBs sitting around that only need finals to be working 100% again. Trouble is ... they are all rigs that use the 2SC1307, which is NLA. I've tried 2SC1969s and 2SC2312s, but they don't sound as good on-the-air. Especially in an 858SSB chassis, which sounds flat and has no audio "punch" without a 1307 in there.

I've put off converting them to MOSFET finals because I wasn't certain of their reliability long term.

I found this video on Utube. It's a stress test of the FQP13N10...

How Bulletproof is the 13N10 Power MOSFET ??