It is lowercase only. But lowercase in number case. The upper and lower case is distinguished based on alignment in this, where in text case it is based on shape and/or size.

Edit: my use of the words number case and letter case does not look like the standard words. But the concept still exist. Check this: https://totallytype.com/figures.php

As far as I know, that is the ‘number case’. Where the difference between upper and lower case is defined based on alignment of the numbers with baseline of typography.

I think the post is taking about ‘letter case’. Which we commonly use to yell at people through text. I don’t think there is an equivalent like that in case of numbers. Mainly because numbers came from languages which are unicase by default. Like the Indian languages and Arabic.

Isn’t Ladybird adopting Swift as their preferred language? I’m slightly confused on why Ladybird over Servo. But I am sure people at Cloudflare have more knowledge than me. So I guess there is a good reason.