Sitting, lying and standing

[niadainud]

What has happened to these words? Why does nearly everyone now write and/or say, "I am sat" / "I'm laying" / "I'm laid" / "He is lay" / "I was stood"?

Why can't people conjugate the verb "to lie"? (As in being in a horizontal position, not being untruthful.)

Does anyone else hate it?

I'm imaging Dicken's tales without arsks and other clasdics without regional dialects and they would be dismal.