It was seen as essential that SQL Server on Linux have identical semantics and performance to SQL Server on Windows, right down to the level of database file compatibility.

Other improvements include persistent memory (PMEM) support in SQL Server 2019 for Linux, enabling SQL Server to bypass the file system for files on DAX formatted PMEM volumes. There are new TCP/IP ...

The SQL Server 2022 public preview may be able to run on other Linux distros right now, Microsoft's document acknowledged. However, there are support implications for doing so, it warned.