Wait, I'll just drop this here:
ATTINY4-TS8RTR-ND
Part Status: End of Life; Last Time Buy Date: 06-05-2017. Minimums may apply.
ATTINY10-TS8RTR-ND
Part Status: End of Life; Last Time Buy Date: 06-05-2017. Minimums may apply.
ATTINY5-TSHRTR-ND
Part Status: End of Life; Last Time Buy Date: 06-05-2017. Minimums may apply.
So they are wiping out the low pin count attiny micros.
About 1400 devices are now:
"Discontinued at Digi-Key", but they are avaliable with a slightly different order code.
By the looks of it some C level person at microchip thinks there are too many order codes for atmel micros. I have to agree.