I wonder if relational databases would not be as popular had easy-to-use transactional filesystems been commonly available at an earlier time. To gain transact

I wonder if relational databases would not be as popular had easy-to-use transactional filesystems been commonly available at an earlier time. To gain transactional integrity (ACID properties) in that day, one had to either purchase a database management system (usually hierarchical or network) and work within that system or be a heckuva programmer and write it oneself. Had transactional filesystems been commonly available, then file processing with those filesystems would have been akin to working with a relational database management system (RDBMS). But that leaves referential integrity (RI) as a programmer task. Unfortunately most sites I've worked at do not seem to believe that RI should be strictly enforced. So maybe it wouldn't make much difference.