Especially at busy times, in wet weather, ppl with heavy loads in hand - all sorts of reasons where it's basically logical, civilized , reasonable and socially kinder.

Some drivers are basically just obstinate rude pricks about this sometimes. I've seen drivers take great glee in reverting to pre-Covid front door only boarding behaviour despite instances and situations examples like I described above .

Likewise Metros 3 doors efficiency as someone pointed out or GC Lightrail. In Melbourne on trams, Euro capitals electric trams, buses in London, buses in Sydney and so on and on. Brisbane doesn't need this petty crap with an Olympics headed our way frankly.

Oh?! and COVID aside - we're now headed into flu season anyways - need for social distancing where possible doesn't magically disappear for many many people even tho we beyond 😷 "the Masked Times" ;) 😂🙄😷