Help me understand Dell Latitude model numbers

This link gives some useful detail about Dell Latitude model numbers.

https://en.tab-tv.com/dell-latitude-identification-and-decoding-of-the-laptop-model/

Unfortunately, it only goes up to 2017.

The first digit is the "series". There are several series, higher numbers are better.

The second digit is the screen size. 1=11", 2=12", ..., 7=17".

The third digit is the year. 1=2010, 2=2011, ..., 7=2016, 8=2017.

The forth digit is connected to form factor - standard, removable screen, transformer.

My question is whether there's a similar decoder ring for newer models.

EDIT:

Okay, so, newer models appear to follow similar convention, with slight changes to last two digits for year.

eg, Dell Latitude 9510 = premium ultrabook, 15" screen, released 2020.

eg Dell Latitude 7440 = ultrabook, 14" screen, released 2023

The first digit identifies the range:

• 9 = premium ultrabook
• 7 = ultrabook
• 5 = mid range
• 3 = entry level

The second digit is the screen size:

• 5 = 15"
• 4 = 14"
• 3 = 13.3"
• 2 = 12.5"
• 1 = 11.6"

The last two digits give the release year:

• 90 = 2018
• 00 = 2019
• 10 = 2020
• 20 = 2021
• 30 = 2022
• 40 = 2023