Why would you want to use the plastic ones again?
They're reusable without the need to purchase new caps.
They can be taken to the lake, pool, pond, and other places where glass bottles might not be allowed.
You can drop them without worrying about them breaking.
If you're ordering them online, shipping prices are much lower as plastic is cheaper than glass.
If you need them last minute, you can run to the 7-11 and pick up some soda bottles that can be dumped and ready to use in minutes.
They tend to come in much larger sizes than glass bottles. (1-2-3 liters)
You don't have to own a capper to seal them.
If you get bottle bombs with them, shards of flying glass aren't a concern.
You can give them a good squeeze during bottle conditioning. If they're rock hard, they're probably carbonated.
I could go on, but I already covered it here:
https://www.homebrewtalk.com/f39/vs-pro-con-analysis-109318/