Shells inside IDEs are an idea that goes back to Xerox PARC workstations, the UNIX folks just have an hard time grasping that in spite of urban myths, there aren't other ways to achieve the same.
Even better, because IDE integrated shells are many cases graphical REPLs with additional interaction capabilities and graphical abilities.
As for the travel into memory lane, here out of 1977,
You can have a nice view how it worked, by following the Wikipedia links, or checking the presentation on Mesa/Cedar, which was the evolution of XDE as Mesa evolved into Cedar, and one of the latest version of XDE as well.
"Emulating a Xerox Star (8010) Information System Running the Xerox Development Environment (XDE) 5.0"
The lack of teaching of the computing world outside Bell Labs leads to a UNIX cult, unaware of the progress that was actually already available in the 70 and 80's, but unfortunely failed to pick up due to several reasons, so in the end there is this idolatration of the UNIX shell.
Even better, because IDE integrated shells are many cases graphical REPLs with additional interaction capabilities and graphical abilities.
As for the travel into memory lane, here out of 1977,
https://en.wikipedia.org/wiki/Xerox_Development_Environment
You can have a nice view how it worked, by following the Wikipedia links, or checking the presentation on Mesa/Cedar, which was the evolution of XDE as Mesa evolved into Cedar, and one of the latest version of XDE as well.
"Emulating a Xerox Star (8010) Information System Running the Xerox Development Environment (XDE) 5.0"
https://www.youtube.com/watch?v=HP4hRUEIuxo
"Eric Bier Demonstrates Cedar"
https://www.youtube.com/watch?v=z_dt7NG38V4
And naturally Smalltalk-80 and Interlisp-D enviroments that precedded it,
"Emulating Smalltalk-80 DV6 on a Xerox 1186 (6085 Daybreak Development Kit)"
https://www.youtube.com/watch?v=dpjRZnUw8MU
"The Interlisp Programming Environment", 1981
http://larry.masinter.net/interlisp-ieee.pdf
The lack of teaching of the computing world outside Bell Labs leads to a UNIX cult, unaware of the progress that was actually already available in the 70 and 80's, but unfortunely failed to pick up due to several reasons, so in the end there is this idolatration of the UNIX shell.