Likewise, I didn't ever get any punctures or windscreen chips then suddenly had two punctures in a year (both co-incidentally after driving through contra-flows where you had to use the hard shoulder...).
Similarly in the 4 years I lived in England I had two replacement windscreens and enough chip repairs that the Autoglass man in Cambridge used to recognise me and know where to find me by the car registration. What surprised me was how many stone chips etc were actually caused by oncoming traffic (local quarry trucks in numerous cases) and not from cars I was following.
ETA I was going to buy the tyre slime option, but I've ended up with free gunk and compressor from a Subaru Outback. Checked the wheel size & canister volume and seemed enough to fill an MV2. The kit was the standard in the new Outback, but the buyer bought a proper spare wheel instead so the kit was free to me.