I switched from a Dyson corded vacuum to a Samsung battery powered one and it’s amazing. I’ll never go back to wired vacuums. My parents have a Dyson battery powered one and it is garbage.
The newer models offer larger batteries and debris capacity, and higher power (suction), but as you mentioned the V10 has been plenty for my household, so they don’t seem worth the extra weight let alone expense.
I previously had a V7 that worked well enough in a smaller home for a few years. After the battery started deteriorating I replaced it with an aftermarket one, but that was slightly larger so it no longer fit in the charging dock. Now the V7 lives in a campervan where it’s still plenty useful.