Blizzard flat out lied when they said they did this to stop bots.
Bots uses these things: LUA Unlockers + fly/teleport hacking. Bots do NOT use multiboxing software.
There are 3 main bot programs used by upwards of a million accounts. All 3 programs would be halted in their tracks if Blizzard simply did this: https://us.forums.blizzard.com/en/wow/t/fly-hacking-lua-unlockers-vast-amount-of-bots-why-doesnt-blizzard-not-fix-this
Blizzard is not doing those things because they do NOT want to remove bots. There are over 500,000 bot accounts, around 25% of all Classic paying accounts. Blizzard banned multiboxing software as a ploy to buy them time to allow bots as long as possible.
Blizzard is not honoring their commitment to fair gameplay as owed to their customers. Their integrity is trash.