He's 42. So what? Big deal. He is better than some NFL quarterbacks. What if he replaced Daniel Jones? I think the G-Men would have a better chance of going to #SBLV than in previous years. Hell, Tom Brady could help the G-Men win at least 10 regular season games. That would be a major improvement in itself!
Don't count Tom Brady out because of his age or for any stupid reason. I feel like he has at least 1 more superbowl left to win. We are talking about 9 Superbowl appearances including 6 wins! Look at his stats here => https://en.wikipedia.org/wiki/Tom_Brady
What if Tom Brady replaced Dak Prescott? I highly doubt it. Jerry Jones has no intention of getting rid of Dak or putting him in any position other than starting QB. The Cowboys surely needs help. They haven't appeared in a Superbowl since...well...Deion, Michael, Emmit, & Troy won #SBXXX.
I think Tom Brady would actually be a good fit for any team. We're just have to wait and see what happens. I think the Patriots should keep Tom Brady, but , if they let him leave, he will be an asset to any team.