[fChk]

Last night I was able to upgrade Debian 8 to Debian 10 from the command line, using a tutorial of Mashiro's:
https://post4vps.com/Thread-Easy-way-to-...-Debian-10

To say the speed increased, is understating it.  Debian 8 performance was OK and normal fast.  But after the reboot, the performance of my VPS was like lightning in comparison.  How come?

There isn't much input here to objectively reason with!.. But yes, if everything was equal application-wise, there is the Kernel upgrade that takes place from a major distribution upgrade to another [1].

Based on @Mashiro's input in Post#4, I would say that the jump from a 3.16.x (in Debian 8) to a 4.19.x kernel (in Debian 10) should not go unnoticed while everything else being equal.

I should check out tutorials for Debian as well.  Like it's not that difficult to use Debian so far coming from CentOS as all I do is replace yum with apt-get, and Google has an answer for everything.  But would be nice for me to have a closer look with a quality how-to tutorial.

@deanhills
You should know that except for the package manager and the commands that go with it (plus few advanced assumptions) you're still using the BASH SHELL, thus at the CLI-level everything  should still work the same... That's the beauty of GNU/LINUX systems!

Over the last few days of tutorials I just come to experience first hand how many iffy and rubbish tutorials there are out there under really good and what seems to be reliable names.  Like maybe the tutorials are mostly used as a cheap means of advertising the business. They are not that complete and can put one on the wrong path very easily, particularly if one takes them seriously.

Agreed!.. 75% of those tutorials are just copy/paste stuff anyway. For the other 25%, you should be aware of their assumptions before using them, which generally require some advanced knowledge or at least an advanced familiarity with the system you're working on.

Hence why blindly following a tutorial rarely works!

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[1]- Well I just saw the benchmarks in the last post of yours, I may comment on that next week.