Wrong ........
the 80's Big 3 won titles when they had a very good bench (81, 84 and especially 86) and lost in the playoffs when the bench was injured ('85, '87) or non-existent ('88 on).
1987 is a perfect example of what you are describing when the starting 5 was the best in basketball and would often end games by the 3d quarter ........... the wear & tear of all that playing time + the lack of a healthy bench cost them the repeat title because they were so beat to hell by the time they crawled into the finals.
80-81 Celtics:
Starters: Bench:
Bird McHale (32 starts)
Archibald Henderson
Maxwell Robey
Ford ML Carr
Parish
McHale great 6th man Henderson, Robey and Carr? Great Bench?
83-84 Celtics:
Starters: Bench:
Bird McHale (10 GS, 4th Mins plyd)
Parish Ainge (16.2 mins/per)
DJ Buckner (15.8 mins/per)
Maxwell Wedman (11 mins/per)
Henderson (78 GS, 6th in Mins played)
McHale now getting more mins than Max and Henderson, otherwise Ainge, Buckner and Wedman, great? plz
85-86 Celtics:
Starters: Bench:
Bird Sichting
McHale Wedman (19 starts, 33yrs old)
Parish Walton (19 mins/per)
DJ
Ainge
Walton 6th man, outside of him where is this especially great bench?
86-87 Celtics, had Sichting, Fred Roberts, Greg Kite and Darren Daye the injured Walton who was 'the bench' crippled this team.
Point being, today's free agents are going to make for a better bench than what was in the 80's. When you have a BIG 3 salary-wise your team is necessarily built top-heavy and the bench is gravy. Powe and Big Baby are already a better bench than what the original BIG 3 had behind them.