People seem to lament the Presto days and whilst I really loved Opera, it was all proprietary software.
Chromium is open source and maintained by Google devs. But - correct me if I am wrong - Gecko is open source and maintained by Mozilla devs. Both companies are making shitty decisions.
It just feels like a lose-lose to me but I can understand why a new browser (2015 is new, right?) would choose Chromium over Gecko.