I think it's good news to read. Yes, 4-6 months is long period of time, but it's better later than never.
Back in November during Black Friday promotion I wanted to buy one hosting plan using Bitcoin payment option. And I experienced how bad BitPay is. So, when I will have to renew my subscription, I hope that BTCpayserver will be implemented already.
Because you need to use their payment protocol (through the URL/QR, which is only supported in a few wallets) and can’t get the address and amount to pay manually (at least not without doing some request tricks or using a 3rd party tool like the above).
I experienced this thing and there was a lot hassle to pay through BitPay. I even wanted to give up and make payment by card, but somehow I managed to make payment. But I hope that I will not have to reapeat this experience