Brad Stevens can turn that roster into a championship, particularly if Leonard and Butler head to LA, although it sounds more likely with Kyrie.
To my mind, Stevens's hallmark so far as an NBA head coach has been that the more talented his team is, the less successful it becomes (and vice versa). I'm not sure that adding another superstar to the roster at the expense of depth plays to his coaching strengths.
Although (and to some degree: of course), better players make a better team most of the time.
In the last decade, teams only win a championship with a top 5 guy:
2009: Kobe
2010: Kobe
2011: Dirk (probably around the fifth best back then)
2012: LeBron
2013: LeBron
2014: Kawhi
2015: Steph
2016: LeBron
2017: KD and Steph
2018: KD and Steph
2019: Kawhi
2020: AD in Boston? Do you really think it’s going to be 2020: Tatum?
Heck, I’d go so far as to say that 2019: Kawhi entry would be for Boston had we traded Brown and Rozier last year. We cannot make the same mistake. It’s absurd how this forum thinks Tatum and/or Brown will blossom into top five guys. Maybe top 10-20. They will almost surely never be as good as AD is today, particularly with AD as the fourth or fifth best player in the league after Kawhi, KD, Curry and LeBron.
Ad is a top 5 guys.
But that in no ways means team wins a championship with him.
And
It in no way means he stays past a season.
Tatum might be a top 5 guy
Brown might be a top 10 guy
Draft picks etc.
Team might be like pistons last championship team.
There are more chances for success and less chamces for gross full on rebuild failure with keeping the jays and staying young
No...there really isn't. Youth isn't a guarantee of more chances at success. There are a ton more examples of youth not developing to expectations and young teams being bad than the opposite. If the C's get AD and win a title but he leaves and the Celtics then have to rebuild and be bad for a few years, that's infinitely better success than being in the 5th to 10th seeding area in the conference for the next 5-6 years, which could easily happen if the Jays don't develop into top 20 players.
Now I am not saying that the Jays won't develop and the team could then turn themselves into, at least, an ECF contender or more for several years, just saying there aren't more guaranteed chances of success that way, given that team would likely never have a top 5 player in the league(let's be honest, neither Tatum or Brown have that type of upside). In having AD, even for a year, the Celtics would have that top 5 player and a realistic chance at a title.
There is a bunch of different ways to team build, no one way guaranteed more shots at long term success.