ISP modifying DNS responses, or at the least potentially logging them. A good reason to use DoH/DoT. ISP logging traffic anyway in UK in order to comply with,

ISP modifying DNS responses, or at the least potentially logging them. A good reason to use DoH/DoT. ISP logging traffic anyway in UK in order to comply with, say, Snoopers charter. ISP providing out-of-date router hardware with unpatched firmware that most people connect directly to their WiFI networks instead of isolating.