ok I'll join in the fun............here's my take on it........
IMO there was less emphasis on missed chances in yesteryears, until such time as the teams started to cotton on to the ideas that:
* lifting your fielding could save you runs in a chase;
* create pressure on the batsmen to force their shots out of their comfort zone;
*create opportunities in the field re run outs etc.
Once they started 'field' training then they started paying attention to what was going on so as to be able to judge their progress / effectiveness..........
Furthermore there are also more 'chances' in todays game as a result of the more 'aggressive' attitude of todays batsmen, as a result of there being fewer 'defensive' players like Richardson......
Lastly the greater general athleticism of todays cricketers (Inzi apart
) also creates more 'chances' out of nothing - where yesteryears players would not have even attempted todays fielders expect to get at least a hand on it...........if not for the catch then to at least hope to stop it carrying to the boundary & thus saving runs (see point No1 above)...........
as previously debated the term 'chance' is subjective & has changed over the years so far as the outstanding effort of yesteryear is now the expected result of today...........I have seen 'brilliant attempts' in yesteryear that have not been taken, where the reporters / commentators would not consider it a 'dropped chance' because of the effort required to make the attempt into a 'chance' (although agreeing that it may have been a 'chance' technically speaking), but today those same efforts are the norm for many of todays top fielders.......and are expected to be accepted on most occaisions..........
bottom line in this perspective is that '1st chance averages' are basically meaningless unless it is a glaring miss to a straight forward opportunity.........
any unofficial 'research' is also subjective as we have no indication as to your parameters, data, controls or methodology......
if it gives you a warm fuzzy then good - but don't expect to convince us of too much otherwise...........or not to get a good debate out of it.......