Well, I dont....
After a few hours I have an idea how a kite is different.
But it takes at least 3 months if riding often, till I can utilize a new (and a bit or a lot different) kite.
The more you ride with the same gear, the more difficult it gets to adapt to a new style.
We always desire a kite just like the one we are used to, just better
This aint gonna happen...
Kites are different, and the more different the longer it takes to get dialed in.
As said, at least 3 months for me, I am not the fastest learner I know, but still used to many different kites.
With a foil kite you dont ride like a LEI, timing is different, sheeting is different - sometimes you can get more power depowering, or even backing it a bit and let it fly forward - hardly used like that on a LEI.
There are so many aspects one can not utilize when changing kite, not untill after a looooong time
I try and experience different gear now and then, quite often in fact, curiosity and because I like to know what "is possible".
My instinct says "stick to the ones you know inside out", but reality and my brain says its better to try something new to challenge yourself, and get a more complete view on all things
Progression, but not in small steps
A foilkite might not be for you and you might be right, but my point is we most often seek what we know and are used to, so exploiting new possibilites with different angles is what we will miss then
Peter