I brought it. The only reason I did at the time was because it's the smallest -- possibly only? -- laptop at the time Apple had with a Retina display. MBA did not have Retina display, which was weird. It's... what it is, it's totally fine for being an ultra-portable laptop for using email, the browser, ssh, whatever, when traveling for business. At the other end of the spectrum my workstation at home is a Mac Pro 7,1I think the 12-inch MacBook failed because it didn’t fit well in the product lineup. It had 8GB RAM, a 256GB SSD and a Retina display, which was quite impressive for the time. On the other hand, it had a small screen, almost no ports, and it was way too slow. The price was quite high, the same as a MacBook Pro. So for whom was it made? If your budget was tight you would obviously still go for the Air. If you had the money and you needed power, you would go for the Pro. The market for the 12-inch was not so clear. I personally never seriously thought of buying it.
I like it quite a bit despite not really using it in months, since all of life has been replaced by Zoom meetings. I will buy the first gen iteration of this because, why not? It won't cost very much and it'll be nice to replace a 4+ year old laptop.