When did CRT technology advance to no convergence required?

[zeno]

Thats a poser. First in lines still had electronic adjustments
& would often need touching up but there were less adjustments.
I would say from abt 1980 on convergence & purity adjustments became
fairly permanent. Changing the jug or yoke was pretty much
the only time it was an issue. Many sets both US & Jap used
the RCA bonded (glued on) yoke CRT's. They also had a tape like magnet
for conv & purity so everything was factory set. Personally I
always liked the delta guns for set-up, after you do a few its
fast work to do it. The whole process made sense but I never
got the hang of in-lines, just messed with them & they would
suddenly fall into place.

73 Zeno