Shared Channel Vs Private Channel

[BijDes]

It seems private channel is subset of Shared channel. Why do we use private channel since shared channel can be used for same purpose. If we create a shared channel and restrict it just few internal team members, is it not same as private channel?

[#2]

@BijDes yes, you can achieve the same functionality with a shared channel as a private channel, with future option to include external people etc.

I think the problem is the name, most users wouldn't know a shared channel could be a private channel, and there isn't a good word to describe the options. 

[#3]

they could do a lot of same things, but the core concept is still different

besides that, some feature is still only available in private channel
https://techcommunity.microsoft.com/t5/microsoft-teams-community-blog/microsoft-teams-specifications...

maybe MS will retire private channel, after 2-3 years later this new feature shared channel is stable to use