Excel is going to have a Date with you, and it's not asking further questions. If you didn't wish to consent to have your col'n shattered, you should have preceded it with a '.
You may argue that writiing 2024 as "MMXXIV" and not "ⅯⅯⅩⅩⅣ" is a mistake but while typists who'd use "2OlO" for "2010" (because they grew up using cost-reduced typewriters) are dying out, you'll never get everyone to use the appropriate Unicode for Roman numerals.
If you think is-number can be replaced with a one-liner, you don't have the enterprise code mindset. What if the world gets more inclusive and MMXXIV, ½ and ⠼⠁ become recognized as numbers? 𒐍𓆾 were numbers in the past but what if people start assigning numeric value to other characters? Are 🖐🔟💯🆢🂵🀌🁅 numbers of the future???/s
I'm not even all kidding, Regex implementations are split on whether "٣" matches \d.
The industrial revolution resulted in climate change that makes it borderline impossible to be active outside in the summer.