This is what makes me worried a lot too. My assumption is that development of the web version will create lot of constrains on the development capacity of the team. And then they will have to sync all the features to be available on all environments (not just mac and iOS).
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Another interesting project that popped up recently is https://inkdrop.app
My English is not good but let me try to give me my advice for you. I always tried to search a tool where I can write my knowledge personal and where I can access them a easy way. I tried a lot of tools. But for me my better experience was:
Very good tool where you can do your notes in markdown, encrypt them if you wish and save in Dropbox(there is support other clouds too), attach filea and access on your computer or in your phone, it doesn't matter place you are and any time.It's an open-source project and it's very active project.
This do almost the same project above but is not open source, you can't attach file and cost $5/month and you can choose save your data encrypted in project server or create your own database.
I've tried both because I prefer in markdown and where I can have access any time anywhere. At this moment I've choose last one (inkdrop).
Sorry for my English mistakes and I hope this to be useful for you.