VPN might be advised for illegal content (which is not endorsed here), other than that there's really no reason to use it.
I have to disagree. In the US, congress allowed ISPs to sell all user data for profit.
I have my entire internet connection go through a vpn because I simply don't trust my ISP with my internet traffic data.
My vpn provider on the other hand claims they keep no data or logs, and their claims have been tested in courts multiple times where they were subpoenaed to hand over data on specific users and the only data they had was that the said user was a paying subscriber, nothing else. Therefore I trust them.