it is always going to be a risk. I got burned by tcp when they discontinued supporting their connected bulbs. tcp is a well know light bulb company. google did the same with the original dropcam. they pulled support and made them worthless. so just because a company is big and well know, don't mean you won't get burned.
I would suggest getting bulbs from different companies so if one is discontinued, you will not have to replace them all at once. I now have a combination of hue, cree, and ge light bulbs. I only have wemo switches because at the time I got them, they were the only ones available. but I have two different models.
as far as having both the echo and mini, you could always use one as a backup. for example, if you go with the echo, sometimes the cloud has problems, it would be nice to use the mini when that happens.