I was watching a video where Dave Jones of EEVBlog interviews Rod Elliot of Elliot Sound Products. Rod was discussing that he tends not to use digital chips in his designs because the chip will become obsolete 6 months after the design is published. He goes on to say that most analog components don't have this problem and goes on to give this quote:
Although transistor types and everything do change, ON Semi for example a lot of their new transistors, they're brand new. They're labelled as being older devices but they're not; they're modern technology. But I try to make sure that my circuits will work. If they update the transistors and they get faster, more linear, that never hurts anybody. If they get faster, usually that makes the amplifier more stable, not less stable.
I don't understand the last part of his statement. Given a standard audio voltage/power feedback amplifier, how does a faster transistor tend to improve stability? If anything, I would have thought that a slower device would improve overall stability. Doesn't more bandwidth offer greater opportunity for higher-frequency poles (caused by reactive passives and parasitics) to interact with the active device's open-loop gain and cause phase shifts which may lead to oscillation?