The formatting is different and especially the security settings are laid out differently I found that whenever I tried it I was never 100% confident that only the people involved in those messages would be able to see them which posed a rather large security risk.
Firefox should be fine because it has its own cryptolibrary which is a little more up to date.
Chrome and IE are outside of general support, however we'll be patching that hole shortly with any luck
What I was trying to get across is that passion isn't always a visible aspect with someone.
I would think though that although some people have some natural ability, without at least a good amount of passion to begin with they'll never get there.
Could be worth a shot I'll be looking to get some legacy browsers on where possible anyway (unless I'm told they'll compromise the security of the site)