Confused about I-485 processing time

[nana.p]

So up to yesterday, I'd thought that it would take 6 to 12 months to get family based green card but apparently in my area (Seattle, WA) it'll take 15 to 26 months for the I 485 alone to be processed? Is this a recent change that I wasn't aware of?
Thank you

[seattle2903]

For Seattle, I don?t think the processing times were ever that low (6-12 months) in the past year or two. It?s been over 10 months. And yes, they recently updated it to even longer. Sigh.

[seattlefiler2017]

So up to yesterday, I'd thought that it would take 6 to 12 months to get family based green card but apparently in my area (Seattle, WA) it'll take 15 to 26 months for the I 485 alone to be processed? Is this a recent change that I wasn't aware of?
Thank you

I just saw this :15.5 Months to 29 Months Family-based adjustment applications

This is definitely very frustrating...