A little more feedback… 
I’ve tried a couple of more ambitious multi-row (brenizier) panos, and while it gives good results , it seems to slow down rather dramatically - with smaller ones it’s very quick to compute the preview, but with the last one I tried (21 16MP images) it froze at 94% so long I thought it had crashed… not sure how long as I left it running while I did other things. When I came back 20min later it was done.
As I write this, my CPU usage is sitting at 100% of which 85% is xpano - I ctrl-clicked 5 images to force include them in the pano which meant it had to recalculate it. It’s been running for at least 4 min and is sitting at 95% completion while using all the CPU it can get.
I expect it will get there, but it seems a little inefficient… Obviously I’m not at all experienced with all this, so if there’s any user error it’s mine 
I have the options for stitching set to include more surrounding images (6 i think) and I lowered the number of matching points to 25 or so. This seemed to work better on these images.
Running Win 11 21H2, CPU is an i5-2400 CPU @ 3.10GHz, 16GB ram and (if it’s relevant) a GTX1650 GPU.
All just in case this is useful - please disregard if it’s just that I’m misusing it!
Edit: it failed this time…
