DIP 1027--String Interpolation--Final Review Discussion Thread

[Mike Parker]

This is the discussion thread for the Final Review of DIP 1027, 
"String Interpolation":

https://github.com/dlang/DIPs/blob/d8f2e769c3a8c711e7886ccecc93eac9795dae9c/DIPs/DIP1027.md

This is the first review in which we are operating under the new 
procedure of using separate threads for discussion and feedback. 
Please see my blog post on the topic:

https://dlang.org/blog/2020/01/26/dip-reviews-discussion-vs-feedback/

Here in the discussion thread, you are free to discuss anything 
and everything related to the DIP. Express your support or 
opposition, debate alternatives, argue the merits... in other 
words, business as usual.

However, if you have any specific feedback for how to improve the 
the proposal itself, then please post it in the feedback thread. 
The feedback thread will be the source for the review summary I 
write at the end of this review round. I will post a link to that 
thread immediately following this post. Just be sure to read and 
understand the Reviewer Guidelines before posting there:

https://github.com/dlang/DIPs/blob/master/docs/guidelines-reviewers.md

The review period will end at 11:59 PM ET on February 13, or when 
I make a post declaring it complete. Discussion in this thread 
may continue beyond that point.

Please stay on topic here. I will delete posts that are 
completely off topic.