I often ask myself, why so many upgrade to the latest version of Max, when the version they have its working just fine. I will continue to use my version until the plugins are not longer supported, only then will I consider an upgrade. but at my age and after giving 2018 a try at a friends studio, I doubt I will ever want it on my system. Yes there is the scene compatibility issue, when someone creates a scene in a newer Max and I have to get them to save it in my version or send me an FBX, but that is rare. and being Freelance, I am rarely ask to share work with others working on the project as I am the only one. I work in Arch Viz and basically al I need is the CAD, floor plans, elevations etc and I model virtually everything required. So I stick with what works, until such time as it doesn't