I.e. can your local law enforcement ping an email over to your ISP and just be handed years worth of IPs accessed? Or is there slightly more friction?
Put another way if I used an exit in Tehran how easy would it be to get my data for Norwegian law enforcement? Even if the end point was 4g in Oslo?
Also dont think those are contradicting concerns. Be careful with what you trust which ISP or VPN provider with. Thinking you are good with just going with either category instead of the other is a recipe for disaster.
Also worth mentioning that to lock your ISP properly out, take a look at hardware firewalls with whitelists and properly chosen signatures for the vpn tunnel. Especially if they are forcing a router into your home network.
To take one example the UK Online Safety Bill could make access to a load of content trickier (or even cause companies to stop offering services in the UK) at which time I expect a load of UK people will start using VPNs to shift their traffic to appear to come from non-UK locations.