For context, DG was about to go obsolete, but Tom (and others) recognized this where almost nobody else would've, and managed to transform the company from a mainframe company to a minicomputer company, with a small, ragtag team of dedicated engineers, without a map or prior art, and with desultory support from the checked-out, incompetent C-suite.
Tom's idiosyncratic, no-nonsense style wasn't for everyone, but I can think of very few tech leaders who could have succeeded as a manager in that situation.
Source: worked directly for Tom at Data General for several years.