- What Studio One Artist version is included - I predict it is v5 at the moment?
Yes, if you purchase(d) a FaderPort 2018 on or after July 7th, 2020, you will get Studio One 5 Artist
- VST plugin support is not included by default if i understood right. I read that there's a need for add on which cost around 70 eur?
No, starting in version 5, VST support is included. See features of different versions here: https://www.presonus.com/products/Studio-One/compare-versions
- 32 bit VST plugin support. No more support for running in 32 bit mode?
Read this Knowledge Base article on your options for 32-bit plugin support
- It seems that there's option to upgrade from Artist to Pro for a lower upgrade price (compared to full stand alone version)?
Subscribe to Sphere for monthly or annual rate that's less than a perpetual license upgrade. https://shop.presonus.com/PreSonus-Sphere
or rent to own with Splice - https://splice.com/daws/38892279-studio-one-5-professional-by-presonus