There&#x27;s <i>always</i> a risk of abandonment, no matter the vendor. A more important question is what sort of lock-in you&#x27;re facing. What are you left with if the project fails?<p>Mozilla tries its damnedest to avoid locking people in, and promoting open, standardized solutions.<p>Persona provided verified email addresses for your users, so there was no intrinsic barrier to migrating off of Persona and to, say, a traditional email + password login scheme. With Firefox OS, building an awesome FxOS experience was synonymous with building a great mobile web experience, because the foundation was in open, standard technologies. Even if FxOS went away, you&#x27;re left with something great that works in other browsers.