You don't get it. Stuff like this does not discourage designers. It is what gets them jobs and keeps them employed. I've worked with marketing departments where it was a designer's primary job to make things look good on email campaigns.
I had a recent request from a product owner to style the subject line... I said we can't do that and that I don't want to live in a world where senders can change the font or size of the subject in an email.... Can you imagine the crap we would have from spam in that case?!
Ah, I referred to the third line, "𝔻𝕠𝕖𝕤 𝕥𝕙𝕚𝕤 𝕨𝕠𝕣𝕜? ", as the "second one" in my message, without mention for line 2, which renders correctly, fortunately. But thanks for the heads up.
Firefox Mobile renders it well for me, are you sure that the comment is not rendered as it should be (with garbage from line 1 overflowing over line 2)?
Indeed, if it's possible, marketing is going to ask for it. And unless you have dedicated developers who specialize in email campaigns, ready to brave the nightmare that is fighting against email client formatting, the only sane and cost-effective solution to implement any kind of layout in an email is simply stacking inline images with text included.
Microsoft's history has shown time after time that both internal conflict and external enterprise clients' requests lead to random developers adding bits and pieces of non-standard features. This applies not only to Outlook but their other products (incl. Windows). It is goddam' Wild West out there and they clearly give no crap about how the standards outside of their universe evolve.
Sorry Microsoft, but the PC world is not Windows-only anymore.
It's not a new problem and MIME was intended to give people the choice. Not everyone likes plain text emails or terminal email clients. The solution may be forcing email senders to include text/plain as well as text/html.