For folks who cannot do this due to it being a work-controlled machine or otherwise, you can use notepad++. (Obviously id rather this be a tipping point to ditch all the junk at once, but sometimes that isnt feasible)
That said, i find i still need a throwaway notepad for fast trashy notes. In that case ive just uninstalled the new notepad and re-downloaded the legacy notepad then re-aimed "notepad.exe" to the legacy one.
There are a few guides out there, just search your standard "how to get legacy notepad"