Personally I'd buy an aircraft carrier if I had $10B. Nevertheless, there are plenty of people willing to put it in Gitlab or they wouldn't IPO. A better question might have been: what's the bull argument for Gitlab?
The usage argument is: buy your own "self-hosted" cloud offering, deployed over any combination of AWS/Azure/GCP/onprem that you like.
The bull argument probably looks something like: replace Microsoft Office 365 / Azure with an integrated "self-hosted" solution, easily deployed to any commoditized compute...handled by GitLab for paying customers, assurances of "escape hatch" to DIY open-source when you stop paying.
