Customization in your TC environment

Hi Everyone. I have some questions, which I'm curious about. What is your company approach to the customizations? How many of them you use? Do you get them from Siemens or some other 3rd party?

With that how big is your TC audience - how many users? And the last one - how often you upgrade to a newer version?

To answer from my side - we have about 3000 users and recently upgraded from TC10 to TC14, so the upgrade cycle is quite long:) We have lower tens of customizations, decustomized a lot before the upgrade, but still we have some number which could be much lower. And we have it half on half - half from Siemns, half from 3rd party.