Pretty sure that our wifi here needs replacing. Ideas on how to confirm and, more importantly, where to get a replacement.
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I like the Netgear Orbi routers. They come in several different varieties. 2 pack, 3 pack, 1 plus 2 small wall plugin satellites. Depending on the shape and size of one's house I prefer one of the following:

Amazon.com: NETGEAR Orbi Ultra-Performance Whole Home Mesh WiFi System - WiFi router and single satellite extender with speeds up to 3Gbps over 5,000 sq. feet, AC3000 (RBK50): Gateway

Amazon.com: NETGEAR Orbi Home WiFi System. Up to 8,000 sq ft AC2200 (RBK44): Gateway

Amazon.com: Netgear Orbi Whole Home Mesh WiFi System with Advanced Cyber Threat Protection, 3-Pack (RBK53S-100NAS): Gateway

Either of these are great and you can't go wrong. Many installations over the past year and so far everyone's been pleased with the performance and range.

Available at Best Buy and online at Amazon.