Quote:
...I'm sure the old guard outnumber the new guard...
I disagree with this but unfortunately there are not any philatelic statistics to draw upon. However we can make some assumptions based upon overall internet usage metrics (the following are from Statista website).

The internet penetration for the US is now at 95% for all age groups so 95% of the entire US population not only has internet connection but also a device which can use it.

When we break this down by age and assuming that most stamp collectors are in the 50+ year old range, the number of US internet users drops off as seen above but is still north of 50%.
I cannot think of any reason why stamp collectors would deviate from the general population. So I think we can safely say that there are more stamp collectors who have internet access than who do not in the US.
Don