Windows 10: Windows 10 takes long time to reboot, shutdown and/or logout.

No. Those 'problems' with Superfetch were fixed almost a decade ago and that information is just clickbait BS these days... Those articles only ever mention "superfetch" as 'bad' but if it was ever able to destroy your ssd then you would also have major issues with web browser caching which is considerably more active and also much larger than what Superfetch does.

Superfetch does two things:
1) Caches binaries in memory - you see Superfetch named "cached memory" on the Task manager memory tab.
2) Stores the binary cache on disk - needed for quicker system startup and during process creation for faster process creation.

The only times Superfetch read/writes to disk is on system startup to load the binary cache into memory and when a new program is installed - tiny compared to web browser caching activity. If you disable superfetch then Windows needs to read binaries from disk every time they are launched instead of using the 'cached' copy already in memory and you're in fact causing more SSD read/write activity by disabling it.

This article sums it up: "Even at 700TB, the lowest failure threshold, you could write 100 GB a day to the drive every single day for over 19 years before the drive failed." and after 4 months it's only used 15.3MB on my system (with Visual Studio and hundreds of other tools installed for development work):
https://i.imgur.com/62cGdhB.png

Here are some other myths:
Don’t Waste Time Optimizing Your SSD, Windows Knows What Its Doing

 

Consider using WPR to record the shutdown, boot, etc.
The challenge will be to learn how to analyze the results or find someone to interpret them:

 

Good idea but again the issue I have does not happen every time...so hard for me to say when to enable the recording before shutdown.