...are modern designs trending "harsher"?
I feel like the emphasis on warm, round sounding tones has taken a backseat to clarity? I quit playing for a long time and when I started again, I noticed this immediately.
How long of a gap are we talking here? When was your prior experience? Perhaps the difference is not in the amp itself but in the speakers. (old 1x15 vs today's 1x12 plus tweeter).