in parameter - do we still need to add -preview=in ?

[mprincip]

On Monday, 10 November 2025 at 13:25:30 UTC, Richard (Rikki) 
Andrew Cattermole wrote:
> On 11/11/2025 2:00 AM, Brother Bill wrote:
>> https://dlang.org/changelog/2.094.0.html#preview-in 
>> https://space-waves.co
>> 
>> My question is whether to get the optimal `const scope` 
>> behavior with `in`, do we still need to add:
>>     `-preview=in` to the CLI when compiling our D program?
> Yes. It has not been turned on by default yet.

hmmm, really?