In the US, supercharger network is/was huge differentiator. In Europe, the fast growth of really good CCS networks made a Tesla adaptor only car less appealing.
As EA and other networks fill the gap, I believe it will eventually become a detractor for Tesla as well, but yes in the interim 2-3 years, I believe it helps to have the Tesla-Chademo adapter widely used.
2019 S Plus (97.98% SOH) & 2019 SV Plus (94.84% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh