Here are a few practical suggestions for your own investigation as an ERP software customer:
Follow your vendor’s website closely. Is your system still being actively promoted to new buyers? Or is it no longer mentioned at all?
Be sure to visit the next annual customer day and ask pointed questions there.
Ask your vendor for the most recent version of his company’s product roadmap in order to see the concrete future plans for your system and version.
Investigate whether your system is already available in the cloud. Or whether it will soon be available. But also determine how long your system will continue to be supported as a traditional on-premise version.
Ask your vendor for a written statement about the strategic value of (the version of) your solution in his portfolio.
Get acquainted with your vendor’s user group. They often have a better overview of the developments. And you can also share, interact and collaborate there with comparable customers.