There's nothing better than a cumilation of stuff , and I also have one .
but , really
your only going to use 2 boards and 2 fins and 2 sails 90% of the time , oh and maybe a RB

Although my favourite sail is the next size down.
And then that smaller pointer fin is really fast.
And then that slalom board that's a bit too small is really good on flat wataer.
And I've had a few really good goes on the sail one size smaller again when it's really blowing.
And you have to have that tiny twitchy emergency sail that's just horrible that you've tried to use once a year and still got beaten up.And hate it.
You definitely won't ever use that 35 cm flexy freeride fin that you got as a spare that came with that awesome freeride board you bought .
My advice , sell it in exchange for harness lines that are too short