I’m using Day One for my daily journal for years. At this point, my streak is 169 days…and this is thanks to the Day One’s great feature.
I tend to journal at night and, very occasionally, I skip one night (mostly when I’m too tired!). When I do though, I don’t see it as a cause of stress. I just do it in the next morning and that’s it, it gets added to my streak and I don’t break the chain. I haven’t missed 2 or more days in a row, but if it happens than I have a choice: either to catch up or leave it and go back to streak 0.
I’d like to see this feature in a lot of different apps, especially for habits apps.