Lazy use of language

No.

Language changes, though, otherwise we’d all be speaking Shakespearean English.

Even Chaucerian English, Sue or perhaps old English 😁.

Language will always evolve.

I think, also, that accents are heard much more on tv, with, sometimes, exaggerated pronunciations, rather than the Standard English that was once the only accent allowed.

I correct myself Standard English is a dialect.

Received Pronunciation is an accent. Sorry for the mix up!

"to" has been pronounced as "ter" by many people in the west of Scotland as long as I can remember.

(Coming up to 70).

at Chaucerian, Mapleleaf!

"Gonna" is a half-cocked use of the English language, said by many.
You'll probably find yourselves listening out for it

"Gonae nae do that " is a popular saying in Scotland .

Accents are great - I have a Scottish one though have lived very happily in England for over forty years. What I really don't like is poor grammar and lazy speech. Pet hate is "could of" instead of "could have" - retired teacher in me coming out !

Speech does evolve as has been said. When we speak quickly words can loose precision. We no longer talk in the clipped way they did in the 30s. Language is basically for communication and understanding.