Most Helpful Guy
You could know if he was just busy and is able to talk again.
You could know if he is ghosting if he doesn't respond.
Cons: None that I can tell.
As for the text, I recommend something more like:
"Hey, sorry I haven't been in touch. I've been so busy! I see that you have been too though. Everything ok?"
Most Helpful Girl
If you think a week is ghosting, try 8 months then a “we should call sometime” before another 8 months-a year