I have noticed them more now I'm getting one. Also that certain colours are most common in particular areas (well in London anyway)I've noticed a similar thing in some areas. Quite surprising how many of them are on the road now, made me a bit unsure if I wanted one anymore but there really hasn't been any other car that I've REALLY wanted. Only other car that I think would have considered would have been the Polestar 2 but didn't really grab me the way the Model 3 has.
Actually ended ordering the M3 after originally going to see the Polstar 2. Saw the M3 on the way out of the sheppards Bush shopping centre. Test drove the merc EQA, then the Tesla and the next day ordered the M3.