The phone runs well now. I hope that it gets security updates, that remains to be seen. This is a HUGE company, with millions of phones out in the wild, They will likely be fine.
As is, it's a $300 phone with top end specs and a huge battery. It may never get nougat. I can buy another phone next year if it bothers me. The phone won't stop working and doing all the things it can already do if the company goes under.