Storable has produced some very interesting .. ahem .. problems for me that I never quite figured out.   I would freeze something, then thaw it again, and it came out corrupted.   Some did, some didn’t.   I don’t know if it was the Perl version, the system (an AS/400), or what.   But what I did find, that worked out equally well for me (given that storage-space was not a concern), was good ol’ JSON, stored in a memo-field in a database.   (Which had the added bonus of being human-readable.)   I’ve worked with plenty of legacy systems since then which seem to have no problems with it, but I’ve become gun-shy.