Who I have the same questioned this topic

I have Motorola Droid Maxx that has recently stopped connecting to WiFi. It will sometimes connect momentarily, then loses it. The WiFi will sometimes show neighboring WiFi's and sometimes not. I've tried rebooting the router and no change. I didn't think it was the router since other phones and computers connect to the same router with no problem. Turning the Data off to disable 4G doesn't change anything. Turning the WiFi off and then on changes nothing. Rebooting the phone may get the WiFi back for a while, but then it drops it again. I checked the system updates, and the last time the phone updated was May 11, 2016. That seemed to be a long time, so I  checked for system updates and it says the device's software is up to date. The version is 24.21.7.en.US.

This seems to be a widespread problem going back several years judging from entries in the forum here. Are there any fixes?