MSSQL still doesn't have replication on Linux. Here's one data scientists hillarious take on the difference between MSSQL and Postgres: https://www.pg-versus-ms.com/
I'm a big fan of PG and PG is good enough that it can compare favorably to MSSQL on its own merits, but that article reads more as a screed against commercial software than an objective assessment of PG's strengths relative to MSSQL. As an example, a big advantage of MSSQL for data analysis applications is its column store indexes which the author dismisses as something he doesn't use.
I'm rather biased, I'll freely admit that. Having deployed some number of Django on PG solutions (some of which deliver moderate req/s) I will gravitate there just on experience alone.
