The argument at the time was that no "native" Swedish words are spelled with a W, so it shouldn't be part of our alphabet. However, but 2006, enough loan-words had been imported to Swedish with W's (like "webben", "the web") and it was in enough brand names (like "Volkswagen") that it should be included.

But I'm still mad about it! This is my tiny ridiculous hill to die on, W should not be part of the Swedish alphabet!

Agricola was born Mikael Olofsson/Olavinpoika, i.e. a simple patronymic surname. He assumed the Latin name when he started studies in a Latin school [1] in Viborg/Viipuri (now Vyborg, Russia). He became interested in the Reformation and Renaissance humanism; later, as an ordained priest, he was sent to Wittenberg and studied directly under Luther himself. He was instrumental in executing the Reformation on the Finnish side of Sweden (then just a Swedish province; Finland as a political or geographical entity didn't really exist yet). Among other deeds, he translated the New Testament to Finnish from Luther's German translation (and besides the whole orthography, had to invent lots of new words in the process).

[1] https://en.wikipedia.org/wiki/Latin_school

This makes some things a bit of a nightmare because words can have different meanings based on those sounds, and that can drastically alter things. "Fèis" - "faaysh" - means "festival", "feis" with a short vowel is not a word you'd use in polite company.

There is a large number of digraphs and trigraphs (do we really need three letters to spell an "o" sound?), but unlike English digraphs they are actually regular: eau is always pronounced the same, while English has at least four different ways of pronouncing gh. French not pronouncing some word endings in most situations is also a bit weird, but that also has pretty regular rules

There exists no other language besides English where the pronunciation rules are so irregular, with so many special cases and exceptions.

Plus, how do you decide what's changed and what's retained? To quote one Mr. Clemens,

In Year 1 that useless letter “c” would be dropped to be replased either by “k” or “s”, and likewise “x” would no longer be part of the alphabet. The only kase in which “c” would be retained would be the “ch” formation, which will be dealt with later. Year 2 might reform “w” spelling, so that “which” and “one” would take the same konsonant, wile Year 3 might well abolish “y” replasing it with “i” and iear 4 might fiks the “g/j” anomali wonse and for all.

Generally, then, the improvement would kontinue iear bai iear with iear 5 doing awai with useless double konsonants, and iears 6-12 or so modifaiing vowlz and the rimeiniing voist and unvoist konsonants. Bai iear 15 or sou, it wud fainali bi posibl tu meik ius ov thi ridandant letez “c”, “y” and “x”—bai now jast a memori in the maindz ov ould doderez —tu riplais “ch”, “sh”, and “th” rispektivili.

Fainali, xen, aafte sam 20 iers ov orxogrefkl riform, wi wud hev a lojikl, kohirnt speling in ius xrewawt xe Ingliy-spiking werld.