ODBC support, Cassandra, Redis, and Azure (Table) Storage support, and support for the kinds of obsolete RDBMS and "4GL" you see in large enterprise and small mom-and-pop backrooms (Progress, Clipper, AdvantageDB, ElevateDB, etc). And SQL script debugging for Postgres.
Currently I have separate tools/clients/IDEs for all the different data systems I target (e.g. SSMS, MySQL Workbench, Azure Storage Explorer, Azure Data Studio, Excel PowerQuery, LinqPad for .NET Framework 4.x for both x86 and x64 because ODBC and OLE-DB are like that); while I have a modest set of portable-ish VM images of obsolete Windows OS instances where I can run MS Access 2003 or some Clipper derivative. I'm also still running Firebird and even FoxPro 9 in another VM somewhere.
...so yes, having a single tool which handles 85% of my tasks without needing to juggle VMs and multiple bloated Electron apps together would be an improvement for me and worth me paying money for.
> Why not fork it and implement that feature, and then use that?
"Fork it" is not a reasonable suggestion considering the amount of work involved (see above).
> If you don't want to deal with a company trying to extract profit from you, use the open source version. That's the way to ensure your own freedom
As I said, I'm perfectly fine with me throwing money at DBeaver. I'm just expressing my frustration with DBeaver that I think they're being callous by not offering perpetual offline licenses for Dbeaver Pro, for any amount of money. The fact they used to[1] but don't anymore suggests they were getting disappointing return business from deep-pocketed "enterprise" customers, but I'm disappointed that their solution to this problem of theirs means leaving my money on the table because now they don't have any product licenses that I can work with.
[1] According to https://dbeaver.com/docs/dbeaver/Differences-between-license... - they stopped doing perpetual licenses after v23.3).