[Titanites]

Only in Matt 1:25 would you be interpreting “until” in the fashion you’ve mentioned.

Not true. A couple of examples:

Matt 28:15 So they took the money and did as they were instructed; and this saying is commonly reported among the Jews until this day. But not after the day this verse was written?

Acts 23:1 Then Paul, looking earnestly at the council, said, "Men [and] brethren, I have lived in all good conscience before God until this day." But not after?

And there are others. "Until" does not necessarily stipulate what happened afterward.

[bonaventura]

2 Kings 6: 23-
"Therefore Michol the daughter of Saul had no child until the day of her death."

Do you propose that after the day of her death Michol began having children?

[HarleyD]

Your verse from Matt 28:15 using "until" is a poor translation and does not use the same Greek word. Here are some other translations including the Catholic Douay-Rheims:

Mat 28:15 So they taking the money, did as they were taught: and this word was spread abroad among the Jews even unto this day. (DR)

Mat 28:15 And they took the money and did as they had been instructed; and this story was widely spread among the Jews, and is to this day. (NASB)

Act 23:1 is also a different word but it doesn't matter. Paul was saying he lived his life with a good conscience "up until that day" meaning, of course, something changed.