Many projects are dropping support for old Python versions very fast. It's not surprising given the history of the Python 2 -> 3 transition. No one wants to end up in that situation anymore. For example, NumPy has already dropped 3.6 support (3.6 will be EOL later this year).
I don't know about "very fast", Python 3.6 was released in 2016 giving people plenty of time to update from 3.5. Those are backward-compatible too.
If you haven't updated in that time, you probably have a systemic problem which shouldn't be blamed on Python moving too fast (in fact I suspect those people don't keep up with bugfixes either, so nudging them to upgrade when they try to update flask/numpy is a good idea).
I have currently Sony XA2 with Sailfish OS. Just ordered Xperia 10 II so I have it ready when they publish the official version for it. I have been using Sailfish as my daily driver since the original Jolla phone was released in 2013.
The only issue that I might see as a blocker for some users is that the Android layer is not perfect. It does not support Bluetooth properly so pretty much any Android app that connects to some external peripheral like smart watch will not work. Additionally, you might need to install for example microG to run some apps via the Android layer.
Redux Toolkit is great and removes most of the usual Redux boilerplate which seems to be the most often used argument against Redux. Additionally, I usually use a function which uses createEntityAdapter, createSlice and createAsyncThunk methods to create Ducks bundles for each REST API resource automatically. As a result I get all async action creators, reducers and basic selectors for some REST API resource with a couple of lines of code.
If you like the stuff in RTK so far, I think you're going to like our upcoming "RTK Query" API, which adds a React Query-inspired data fetching abstraction:
Azure Function App development experience is indeed pretty nice at least when using .NET Core. There are some issues, like loading secrets to the local dev environment from Key Vault has to be done manually and easy auth (App Service Authentication) does not work locally.
If the Falcon 9 landings feel mundane, I would recommend to follow Starship development. Starship SN6 might do a 150 meter hop later today: https://www.youtube.com/watch?v=Ky5l9ZxsG9M
iPhone X introduced very similar gestures as seen on Sailfish OS (https://support.apple.com/en-us/HT208204). They might be a bit alien at first, but once you get used to them, they are in my opinion far more powerful (one-handed use), faster and more intuitive than buttons. I have used Sailfish OS based phones since 2013 as my daily driver and Android/iOS UX feels very clumsy to me.
Python's packaging system was and is still sometimes somewhat broken. However, it's getting better: compilation related issues are rarer nowadays thanks to the wheel pre-built package format (https://www.python.org/dev/peps/pep-0491/). Another great thing is the manylinux tag (https://www.python.org/dev/peps/pep-0513/) which allows to create portable packages which are compatible with many distributions + contain all required dependencies. For example, I didn't want to compile anymore OpenCV all the time by myself so I made it available as wheel package in PyPI: https://pypi.python.org/pypi/opencv-python
