Calendar Travel Time Features Still Inconsistent Between Devices

The travel time feature is still inconsistent across Web, Mac, and iPhone.

• On the Web, it’s completely missing.
• On iPhone, I can set the departure location, but not a custom travel time. Only fixed options like 5, 15, 30 minutes or 1 hour, but no free-form input!
• On Mac, I can set a custom travel time using a number input, but I can’t choose the departure location, and it often defaults to somewhere I don’t want, like my workplace instead of my home!

I’ve seen forum posts about this issue going back several years, and it’s still not resolved! When can we expect consistent functionality across all platforms?