My 3012B occasionally boots up without issue...that's why I bought a Sigilent. I do miss that TEK.My ancient Tek TDS3032 runs on Linux, and at 25 years old, is still good (now I've replaced the NVRAM). Worn out a few floppy disks, mind. My R&S RTO1012 runs on Windoze XP; I dare not plug anything to it, and frankly, I don't like it much, but it had a far better FFT than similarly-priced Teks of the time. Never liked HP, but that's just me.
Now I pair the Sigilent with my 2465B on occasion.
FWIW, the wave-form generator of the Sigilent has THD+N of around 0.02%, at 1kHz... not excellent but good enough for a lot of analysis.