That's the spirit, Bernie! No one is too old to learn something new!
Probably my favorite thing to do using the arranger section of my BK9 is to simply put it into Pianist2 mode, put on the Dynamic Arranger, turn of all the Parts except bass and drums (and maybe rhythm guitar) and just play normal piano...
It does a frighteningly good job of following the chords and inversions without adjusting away from regular two handed piano technique (you had to be a lot different back in the old Pianist1 mode!), and then just bang away at a bunch of jazz standards.
If you can, put the variation and fill triggering onto a multi-pedal, and then there's no interruption to your playing. There are times it can really fool you into thinking you simply have a great little rhythm section actually LISTENING to you! 😱🤣🎹
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An arranger is just a tool. What matters is what you build with it..!