Why does version 7.1 not support develop mode?

I am a developer and interested in Develop Mode of SS.

But Squarespace  v7.1 does not support the Developer Platform without any explanation. Can anyone help me to explain it clearly?

https://support.squarespace.com/hc/en-us/articles/360027708412-About-Squarespace-version-7-1

In future versions, will it be completely deleted?

My website needs Develop Mode to create some custom post type. Is there a different way to be able to create a custom post type in 7.1?

I also have the same question.

I have same question, I want to create custom post type in my blog

You can do almost anything in 7.1. I did all custom blog pages just using CSS and column alignment. 

On 6/4/2021 at 8:54 AM, paul2009 said:

If you need Custom Post Types then you'll need to use Squarespace 7.0. This version is still available. The newer version of Squarespace (7.1) does not (and will not) have Developer Mode.

Are there plans to eventually remove 7.0 and developer mode completely at some point?