I Guess that it would depend a bit on what kind of wood you are cutting, and elevation can make some difference too.
I bought my 266XP around '91, it and my little 23 Compact were my 2 saw plan for about 25 years.
I have a 24" Bar with a Full Comp Chain on it, and for years lived below 1000' elevation, and cut almost entirely Douglas Fir and other Softwoods, we just don't get much Hardwood in my area. I could BURY that 24" Bar and Full Comp Chain in a Big D Fir, and that 266 would just keep Ripping
After we moved up to Mt. Hood, I Buried the Bar in a Big D Fir, but above 6,000' elevation, and it was working hard, and not getting the job done as quickly as it normally would, but was "Managing", but I hadn't retuned it for high elevation, I figured better to run Rich and accept some power loss, as my cutting varies widely in elevation.
Trading the Full Comp, for a Skip tooth Chain probably would have helped, but I had never needed one before, so I didn't have one.
Cutting Big wood, at High Elevation was a "Good Excuse " to get a BIGGER SAW
.
If you are cutting a lot of Oak, or other Hardwoods, a 24" B&C might be a bit much, but for a quarter Century of my cutting, my 266XP handled a 24" B&C Very Well.
My 266 made a Husky Believer out of me, and it is a Saw that I will NEVER Part with.
Doug