1) When I want to make sure a site doesn't get saved to my network/client profile on search engines and content sites.
2) When I need to verify that something is up/down compared to what I or a customer is seeing.
3) When I need to force IPv4 (tor is ipv4 only)
4) Hidden services.
5) Hotel/Airport wifi.
Remember that Tor only routes TCP. It's not a substitute for a VPN in many circumstances.
For 2), Tor browser is a single executable that I can just start and run on any computer, even through a remote control if I want to very the network through a customers own computer. No credentials, no payments, no waiting.
Don't know enough about nordvpn for 3).
4) Hidden services is tor only.
5) Nordvpn would work fine for that.
Different security threat need different security measures. The biggest risk to my own security is not that someone mitm my tor connection because I do not use tor for services which I have an account with, and would never do banking on a tor connection. My bank can more or less find what my network is anyway by looking at my transaction and which of those is an ISP. Leaks from companies however seems so common that one get posted here on HN every month, and haveibeenpawned feel more relevant today than antivirus.
The breach was limited - but it doesn't inspire confidence.
[0] https://www.techradar.com/news/whats-the-truth-about-the-nor...
NordVPN left the backdoor open themselves - they left a remote admin console enabled. Then, they proceeded to hold their silence for _six months_, before informing their customers... And take no responsibility. They struggled to even admit they got their dates wrong.
That kind of behaviour, and lack of transparency, is the problem. Not that a breach occurred.