I'll keep it mind, as I might still end up choosing a different one.
The chosen one is closer to my original vision, but you do have a point that the yellow ones look more polished.
Also, since time immemorial, databases are cylinders and data comes in cubes.
For logo purposes, these are both strong, while the second adds “personality”:
https://i.imgur.com/j6P4Oh4.jpg
https://i.imgur.com/kM23GZV.jpg
I really like the design breaking out of the strong circle, and your hard hat idea was great. That last one could have been your logo “as is”!
Though you could consider replacing the green cubes with cylinders, or simply hand add rubix cube lines to these green cubes to make them data cubes.
https://duckduckgo.com/?q=data+cube&t=ha&va=j&ia=images&iax=...
Thanks for sharing the process!