I really haven't seen connection problems with WiFi. Once configured with the router's SSID & password, everything seems to connect rather quickly and seamlessly as they power-up.
I shut everything down at night and my SSID is not broadcast but everything connects smoothly when I start my day or start their day. That's 1 SmarTV, 2 Macs, 3 W10, 3 W7, 1 Dell laser printer, 1 RPi3, a 6TB HDD, plus a handful of ESP8266 modules in development projects. And, I expect Santa to bring me an Onion Omega Plus at year-end.
I did have one cheap Android tablet that would not connect to the hidden SSID. I solved that by giving it away.