Question for those skilled and working in the web page updates and develop areas.
Posed at a meeting today for a business web page update was:
The group presenting advised that the new latest flash as updated web page would only be supported by Chrome and or Firefox.
So all our customers using our current webpage will if using Microsoft Edge and or Explorer will have too (if they wish to continue doing business with our group) switch to Chrome of Firefox

A few of us were rather concerned that we could alienate a number of our current customers with this proposal.
Group presenting claimed that Microsoft isn't that that good so the need not to update the page enabling "all" users.
So regardless of how good each system is, who thinks this is a good business move?
Thanks for any feedback