I do understand the "nice to have feeling" that a spare and a jack gives you, I felt sceptical of the "pump and goo" solution when I first got my 4x4TA but the frequency of punctures these days really doesn't warrant carrying all that stuff around plus, more significantly, the risks associated with a roadside wheel swap definitely don't warrant it.
In my ownership 6 or 7 years now the Panda has had one puncture - on the drive. I have never (never say never

) had a puncture in my Volvo 940 in 20+ years nor in a MERC E class estate that also passed through my ownership for 10 years. Needless to say tyres are replaced before hitting the tyre wear indicators and pressures checked etc.
As a cyclist, tubeless "pump and goo" solutions are currently fashionable and work well (in my experience) I have also owned a Mini with the original Denovo run-flats which never had to (run flat).
My point is, I guess, is the likelihood of a puncture is statistically quite low even with the proliferation of potholes at the moment.