Breachstone 3.21 Standard league

What happens to mid tier breachstones in Standard on league change to 3.21.
Will they disappear, change to basic breachstone or upgrade to flawless?

It was mentioned during the reveal, probably in the Q&A section afterwards (video available on ZiggyD's youtube channel instead of GGG's) that they would become basic breachstones.

Since the base level of the breachstones is going up to the current area levels that Pure Breachstones give, though, I think they main thing you'd be missing out on would be the current blessing droprate from Pure breachstones.

Its also in the patch notes

"Charged, Enriched and Pure Breachstones have been removed. Existing items will be converted to regular Breachstones upon logging in after the launch of 3.21.0."

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Torguemada wrote:

Its also in the patch notes

"Charged, Enriched and Pure Breachstones have been removed. Existing items will be converted to regular Breachstones upon logging in after the launch of 3.21.0."

Question is, would it be better to run the Pure breach stones now or leave them to be converted ??

Since the new basic stones are equal to the old Pure stones, there's no downside either way.