It all comes down to guaranteed money imo.
however stroud for the past 2 years hasn't been an elite qb, he has been..average to below average. if this year is like last year, he won't get 60. hell he won't get 50. he was worse than Mac Jones,..who got 10 last year (backup) last year he was 17th in qb rating. so unless he improves, play wise, 40 imo at best a year.
Patriots are going to have the same issue with Maye Next Year. potentially in the other direction. if THIS year he is as good as or better than Last Year....it'll be a bitch for his extension. he will be looking for 60+ a year with ~200+(probably 250) in guaranteed money.