I had some problems with mssql package, for example. It simply does not work with Python 3.7.
And
as you can read, there's no much really new or interesting, apart improvements to asyncio and the fact that Logger is pickable now. But this is for asynchronous and multiprocessing programming, so I don't think it will interest the majority of the people here.
Yes, there are many speed improvements, but face the facts: we don't choose Python because is fast. Python is slow as a stubborn mule.