Last time I played past two seasons was some twelve, fifteen years ago on CM01/02 ... my problem is that I am a fan of few teams, mostly Manchester United, but few others, and I almost always play with them... on CM I used to even manage 4-5 teams in the same save (had some in-house rules to prevent cheating).. but it gets boring because be it Celtic, Manchester United, Ajax, Parma or Athletic Bilbao, more or less they are always in the top tier, well aside for Parma right now, and in a matter of season or two I just start steamrolling all over the place. Right now I'm in my first season with Manchester United on FM21... and basically I cheat and force myself to lose certain matches, to make it more interesting and not win the Premiership in the first season.
So, you can see why I am considering youth only very low league save, the only thing that prevents me from doing it right away, is lack of time... but I will get to it sooner or later.
I digress and ramble a bit here, but just wanted to point out and thank you for giving me ideas and making me realize what could potentially be challenging but very fun save at the same time.