In terms of money, opportunity, level played/playing at?
It's a fine balancing act in terms of perceived 'success' (i.e. wealth + a Prem League player) vs happiness and a good, healthy work/life balance.
Phil Jones should serve as a warning to those that come after him:
https://www.sportbible.com/football/football-news/man-utd/phil-jones-manchester-united-injury-mental-trauma-interview-590255-20240917
"Phil Jones opens up on 'mental trauma' he suffered at Man Utd in incredibly honest interview"
I wonder how much happier Jones's career could have been on an alternate timeline well away from the pressure cooker mess of Old Trafford.
Money isn't everything, (the World doesn't always work this way), but give me the choice of the 'Phil Jones' route and being worth £40M, or playing for a Championship club where you're idolised, appreciated, and minus the abuse, and end up only worth £10M, it's a no brainer for me.
I agree with @Exiled_Rover too, the Southampton fan base is turning quite nasty towards BBD. And as a struggling club, him being a confidence player (who's also susceptible to barren spells), I fear things could get bad for him.