So I looked at unity editor usage (from analytics). Thought that might be useful in deciding which unity versions to support in your AS packages. Here’s data from last month (2015 Nov 19 - Dec 19), excluding sessions from beta versions. OS share is 84.3% Windows, 15.7% Mac.
Older data from 2015 October:
Older data from 2015 July:
Older data from 2015 March:
Thanks Aras.
This is a huge help 
Is this actual editor usage… or is this unity versions logging into the asset store? does the editor automatically log statistics back to UT when it runs? I would love to believe the above and dump 3.5 support for my assets. But somehow I just don’t believe the statistics.
Perhaps 3.5 users are just an extremely vocal minority.
This is % of total editor sessions (of the ones that did not have analytics disabled in preferences).
Thank you for the September update.
It would be cool to have those stats available somewhere regulary, like you do with the hardware stats. If it’s not too much to ask 
Argh, you are reminding me I have to go and publish new hardware stats!
No beta data?
4.3 still has a big enough share and would be the recommended version i guess
I’m guessing 100% of the beta users use the beta 
We tried to find these statistics before, but couldn’t. This is very useful information. It should be part of Unity publisher’s section and be updated every couple of months.
We no longer have to waste weeks of development to also support Unity version 3 users when they are almost nonexistent.
Thanks again for the information. I hope this can be continued for feature versions of Unity.
Current beta usage (2014 September): 81.5% sessions using 4.6; 6.6% using 5.0; the rest various versions of 4.5.x and 4.3.x patch releases before they were released. Total number of sessions using beta versions is close to 10% of total editor sessions.
Really useful, thanks!
Updated with 2014 December data.
I thought a lot would be still reluctant to update to 4.6, so I also kept my 4.5 Unity.
Wow i would have thought most people were on 4.6 by now for the new UI
4.3.4 is still the best choice for asset developers i suppose. I will postpone upgrading until this is down to 4.2 levels.
4.6 is still very new. Many productions are in-progress, and it can be risky to upgrade mid-production.
That said, for all iOS users I’d strongly advise to upgrade to 4.6. Unity 4.6-based version is the oldest one that will get 64 bit iOS & Metal support soon (of course 5.0 will get that too).
Very useful, Indeed ! Thanks a lot Aras !
For Asset Store logins for the past 3 months, the numbers look something like this:
3.1 <0.001 %
3.2 <0.01 %
3.3 0.01 %
3.4 0.10 %
3.5 0.74 %
4.0 0.36 %
4.1 0.39 %
4.2 0.75 %
4.3 8.50 %
4.5 62.05 %
4.6 24.82 %
5.0 2.25 %
/L
Also very useful info!
