PHIZZY:
At least the Churches of Christendom were in reality that people had to work long hours during the week! So, Sunday was their day to be free to attend for an hour or so.
As somebody who worked full time it was hard to make weeknight meetings when I was in the Witness religion. If the religion adopts one meeting during the week there will be those who work and either cannot make it or they will be late.
Not that it makes any difference to me since I am long Out of the Witnesses…but I think it would be a mistake on their part to abandon a Sunday meeting in favor of one during the week. Just my opinion.