Hi Vitaliy - 

InterSystems IRIS has been on the market more than 3 years now and is the platform the general market is developing on.   We've worked to make it easy to get InterSystems IRIS and the VS Code dev tooling, and are working to make independent components available easily as well.

By far the vast majority of users that want Caché are existing customers - so you can get this easily through the WRC.

Hi Stephen - 

Sorry for the slow response on this.  We are not releasing the quarterly CD releases for Health Connect, so there isn't a 2019.4 available for it.  The most recent version is 2019.1.1.   But we'll have a 2020.1 out shortly (there's a preview available now if you want to work with it).

Since you are moving from 2017.1, you should be aware that the underlying technology has changed (from being based on Ensemble to being based on InterSystems IRIS) , so technically this is an in-place conversion.   Please look at the in-place conversion guide ahead of your move, and if you follow the steps it should go quite smoothly.