I’ve been using the same /home since OS 11.0 through every version up to 11.4, since 11.3 it’s been exported as an nfs mount to two other machines in conjuction with nis logins
It was a lot more finnicky in 11-11.2, but bear in mind that was from around when kde4 was coming in and maturing, than it was on installing the later ones, but hasn’t been much that didn’t ‘just work’ in the newer versions of most apps
I’ve currently got the machine the /home is exported from still running 11.3, and the two other machines I mount the exported nfs /home on running 11.4 without any glitches whatsoever
Out of curiosity I logged into a desktop on the machine containing the /home just to see if it had any adverse effect on app settings, desktop configuration etc, the only thing I’ve found is that I’m using the Search and Launch desktop layout since installing 11.4, on 11.3 using the layout I can’t get any right-click menus on the desktop itself, meaning I can’t do stuff like change the wallpaper, add widgets etc
So that little issue aside, it wouldn’t after all be relevant to a ‘normal’ desktop machine install, installing 11.4 using the same /home partition you were in 11.3 should be pretty flawless & seamless
(Incidentally I tried the Search and Launch layout on two other machines using local /homes still running 11.3 and they both had the same right-click issue, and cos you can’t right-click … darned if I know how to change it back!)
I’ve always prefered a ‘fresh install’ over an upgrade and I don’t think I’m alone in that, and more often than not I use a network install disk so as to be starting out with the latest versions of things from the word go, if you use anything else you end up downloading the same stuff as updates once the installion’ finishes as updates anyway … so you wait for it all to install, then wait for it to download as updates then install all over again
But the real beauty of a network install is you’re more likely to end up with less stuff you’ve no use for and never use, though on the downside it does mean a little more work afterwards in terms of installing things like libraries, kernel headers, apps you always use etc, if that stuff puts you off I’d go with a dvd install
I’ve just previewed that and not sure which I’ve been the most, helpful or confusing, so to sum up …
Personally I would do a fresh install keeping your original /home, just mount it without formatting during the partition setup part, use either ‘edit’ or ‘create partition setup’, I always use create, and everything should work fine for you