I guess I wasn't clear enough about what I am asking. Let me try one more time.
Below are some of the recent Cinnamon Desktop version numbers and release dates.
3.8.8 - Jul 17, 2018
3.8.9 - Sep 11, 2018
4.0 - Nov 4, 2018 ---> more than 8 months ago.
4.0.1 - Nov 12, 2018
4.0.2 - Nov 19, 2018
.....
.....
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4.0.10 - Mar 21, 2019
4.2 - Jun 29, 2019
4.2.1 - Jul 10, 2019
4.2.2 - Jul 11, 2019
The upgrade between 3.8.x and 4.0.x is a Major upgrade. While the upgrade from 4.0.x to 4.2.x brings big improvements, especially performance wise, it is not as Major upgrade as from 3.8.x to 4.0.x.
Now there is an obvious reason people like us wants to use sid, or sid based rolling linux distro and that is to be able to use (have access) to the latest versions of software packages. That's why I was a little disappointed and surprised that the cinnamon desktop version was only 3.8.8 after I finished installation and updating my new Siduction installation. I was expecting one of the 4.0.x releases, not the 4.2.x version which released 2 weeks ago. I find 3.8.8 release quite old for a rolling release like this.
I wanted to check the Debian Experimental Repository. I wanted to see if there is an updated package there. Because if the Experimental had more recent package, then I would expect it to be updated in Sid a couple of weeks later. But no, even the Experimental Repository didn't have a newer version other than the same 3.8.8. Again, disappointed and a little surprised as well. But I understand. Obviously there is not enough interest, request and demand for updated Cinnamon packages and/or there is not enough people to work on it. That's fine, I understand and I am not complaining. However, I am asking if there is an easy & simple way for me to install a more recent version of cinnamon desktop environment on my Siduction installation.
That was my question.
@melmarker
Really - what do you expect a week after a debian release - hint - it isn't so often and was prepared some month? New packages automagically ...?
Yes, really!! Why you were so much surprised?
What it has to do anything with the timing of Debian Release? I cannot make the connection.
I don't understand the rest, so I cannot answer nor comment.
Maybe it is worth to try Arch, Manjaro or Linux Mint. Or just wait.
That's not a "maybe", that's "definitely" worth trying. Which I did. I mean, I didn't try Arch but I did try Manjaro. Amazing rolling distro. Only if it was based on Debian sid. I have only used Debian based distros so far (as a part time linux user) now it's a challenge for me to use something else. I wanna stick with what I am familiar with. Linux Mint is not a rolling release. LMDE 3 is based on Debian Stretch, so doesn't help me.
Thanks for taking the time to write me some useless comments. I am jealous of some people who has so much extra time to waste.
Thanks...