Yes, my flatmate had a very old 20+ yrs old microwave (the type with a mechanical dial) and when he used it my WiFi would completely drop out until the cooking

Yes, my flatmate had a very old 20+ yrs old microwave (the type with a mechanical dial) and when he used it my WiFi would completely drop out until the cooking was done. I bought him a new microwave because I was sick of dropping zoom calls. The modern LG microwave was much better and has virtually no effect on the WiFi.