What about items that are not programs like microsoft office; but photos, videos, word documents, things of that nature?
Those things are just fine.
The only problem you might run into is where they are.
If those things are in the Libraries....Documents/Pictures/Videos...then you'll run into a fixable permissions issue.
The permissions on the Libraries are tied to the original user.
And easy workaround is, before you decommission the old system....copy all that data off to some other storage place. Just the files, not the actual "Library".
ex: the /Users/<lewisanada>/Documents carries the permissions. The files within it do not.