"Are people just expecting too much from webmail ?"
Dont think so.
Virtually everyone in my business and personal circle is on webmail and the convenience, especially travelling international, of being able to go on any internet browser and communicate is priceless.
Of more importance is the level of service the SMX - Spark Xtra webmail has to compete with. Gmail is fairly reliable whereas SMX is proving to be a bit of a dud and thats saying something after what yahoo inflicted on us. Only this morning we cannot access Xtra email and its taken hours for Xtra to even put up this note on their outage website.
"All customers are unable to log into the Smartphone App or MySpark Digital to access account information, make changes or make payments. Customers are also unable to log into Xtra email. The issue started at 05/09/2017 07:40. Our Spark techs are working on it right now and we are hoping to have it fixed for you as quickly as possible."
I note its just changed to -
"We are currently experiencing issues with Xtramail. The issue started at approx 05/09/2017 7:40. Our engineers are working on it right now and we are hoping to have it fixed for you as quickly as possible. "
A better question might be.... What percentage of the client base needs to get inconvenienced before Spark or SMX publicly admits they have a problem ?

