How will the possible addition of HiFi to Spotify affect TIDAL and other lossless streaming services?

As Spotify seems to be adding lossless alongside other features in a new plan (Which I have no hope for it coming to fruition honestly speaking) crafted from their deal with major labels, I've been left wondering how it'll affect the future of TIDAL, Qobuz, and other lossless streaming services as a sustainable entity.

I've seen people say countless times that as soon as Spotify adds HiFi, they'll switch, and it makes me worry about the impact it'll have on its user base once/when it happens.