If you're just talking about running a typical Linux server with your server applications on top, then it's 99% of the time all 64-bit and nothing to worry about. 64-bit time is going to be used on 32-bit systems as well, so if you have those systems make sure to upgrade them in a decade.
Though saying this, I think you still have to manually remember to upgrade XFS filesystems so maybe there will be some things to worry about next decade.
Though saying this, I think you still have to manually remember to upgrade XFS filesystems so maybe there will be some things to worry about next decade.