I'm glad those halcyon days are behind me! π€£
It's unclear to me why Starlink Maritime would function differently on a TA. As others have pointed out, Starlink Ground restricts the location to supported countries and just offshore. You can see the Starlink constellation by clicking here.
Another factor to consider will be your actual connection to work - particularly if your IT department requires a Virtual Private Network (VPN) to access SalesForce, your email, etc. VPN was not supported on Voom Internet; however, I was above to get it to work on Freedom OTS a few years back. I've seen anecdotal comments about VPN working on RCL Starlink-equipped ships.
I think the key takeaway here is to hope for the best, but expect the worst. If connectivity is required with minimal off-line time, a TA may not be the best for you.
Good luck! --bruce T.