Their side
When Word Dictate is the right answer
If you already pay for Microsoft 365, you write long documents in Word, your language is in Microsoft's fully-supported tier, and you have a stable connection, use Dictate. It is in the ribbon, it costs nothing extra, and paying a second subscription to do the same job inside the same app would be a poor trade.
It also reaches places we do not. Dictate works on iOS and Android, so if a meaningful part of your dictation happens on a phone, that is something we cannot offer at all. And it spans Outlook and PowerPoint as well as Word, which is convenient if your day lives inside Microsoft 365.
So if you are an existing Microsoft 365 subscriber, writing English prose inside Word, on a connection you can rely on, this page is telling you to keep what you have. Change any one of those three - a different language, work outside Word, or a network you cannot count on - and Dictate stops covering you, which is where SnailText comes in.