I don't think the lack of pandemics on the scale of the coronavirus/spanish flu for the last 100 years has been a lack of connectivity. The coronavirus would have played out the same in the 40s as today, except it probably would have been worse in the 1940's. The reasons we haven't had one in 100 years is we haven't had the right virus.

Now will we have another in the next 100 years? I don't think anyone knows what the base rate for 1918/coronavirus style viruses are, but there is no reason to think it will happen more frequently than the last 100.