Yes, unless you have reason to question the performance. I would never change stuff just because I can. Once you get into changing the transistors, why stop there, as resistors especially carbon ones change value, and plastic connectors get brittle and can snap, then there's mechanical wear and.....and.....and.Do you guys think the transistors are safe to leave alone?
Some of the recapping 'kits' can be ordered with or without transistors.
If something's faulty or out of spec by all means change it, but not otherwise......if it ain't broke.......
S