

Was this question also posted a few weeks ago?
In any case, what exactly are the requirements here? You mentioned encrypted journaling app, but also gave an example of burning a handwritten sheet. Do you need to recover the text after it is written, or can it simply be discarded into the void once it’s been fully written out?
If encryption is to protect the document while it’s still a draft, then obviously that won’t work for handwritten pages.

From the perspective of a user, why would they care about development speed? A user, by sheer definition of wanting to use the software, can only use software that is already developed. If it’s not actually developed yet… they can’t use it. So either they see the software at the end of the development cycle, or they never see it at all. Development speed simply isn’t relevant to a user at that point. (exception: video games, but I’m not aware of any desktop game developed using a web framework)
As for platform consistency, again, why would the user care? Unless each user is actually running the same software on multiple platforms (ie a Windows user at work, Arch at home, and BSD at their side-gig), this is a hard sell to get users to care. A single-platform user might never see what the same software looks like on any other platform. Even mobile apps necessarily differ in ways that matter, so consistency is already gone there.
What I’m getting at is that the concerns of developers will not always be equally concerning to users. For users to care would be to concern themselves with things outside of their control; why would they do that?