Better late than never?
I don’t think anyone ever expects an immediate response to a text but ignores someone for two years. Come on. If they were busy the whole time, what exactly were they doing? Maybe They’re in the service industry or something?
The only thing that would make this situation justifiable is if the person they’re trying to keep up with is a friend or loved one. But even then, we doubt they are a friend or love interest. This sounds an awful lot like ghosting to us.