darkoshi

Wiktionary: till

Etymology: From Middle English til, from Northern Old English til, from or akin to Old Norse til (“to, till”); both from Proto-Germanic *til (“to, toward”), from Proto-Germanic *tilą (“planned point in time”). Not a shortening of until; rather, until comes from till with the prefix un- (“against; toward; up to”) also found in unto.

Merriam Webster: Until, till, 'til, or 'till?

...till is not a shortening of until. It actually predates the longer word.

Till has been in use in English since the 9th century; the earliest sense of the word was the same as the preposition to. It has been used as a conjunction meaning "until" since the 12th century. Until has been in use as both a preposition and a conjunction for almost as long.

I prefer to write "til" with a single L and no apostrophe because it is easier, and because "till" looks like something a farmer does, or something dealing with money. There's no other word "til" so why shouldn't it be acceptable that way?