And on a more fundamental standpoint I get that disk space is cheap theses days. But you just doubled, if not worse, the storage space required for a key for a

And on a more fundamental standpoint I get that disk space is cheap theses days. But you just doubled, if not worse, the storage space required for a key for a vague reason. It may never make any difference on a small dataset, where storage was anyway unaware of differences between integer and text. But it would be hiding in the dark. And maybe in a few year a new recruit will have the outstanding idea to convert text-link to bigint to save some space...