nighthawk r6700v2 losing internet connection periodically

My story, I had a Motorolla modem comabined with a ASUS R66U router.  Everything worked fine until 8 months ago, I started having connectivity issues.  I was told by XFinity techs that my modem was the issue.  Since my modem and router were kind of old, I decided to buy a Netgear cable modem CM400 and the Netgear R6700v2.  Everything has been working okay.  I was having some connectivity issues, but it only happened twice or three times a month.  So, I thought it was my ISP.

For the past 2 months, I have had issues to were I completely lose internet connection.  The only way to gain it back is to reset the modem and/or the router.  Thereafter, the internet connection works fine.  For the past 3 weeks I've had to reset the modem/router at least 3 times a day.  I have called XFinity and they've sent two different techs.  They've replaced all the exterior / interior cables, and the issue still persist.

I've called Netgear customer support, and I've been waiting for hours to talk to someone, and I am just tired of waiting.  So, I Googled this issue, and I found this forum.  It is good to know that I am not alone with this issue, but now I've got an obsolete Netgear Modem and router.  Furthermore, I've got 3 Netgear switches as well.

It doesn't appear that Netgear has a solution for our connectivity issues.  Now, I've got to explain to the wife that we need to spend more money on a new modem, router and switches.  I guess I'll be going back to Linksys or Asus.