Didn't read it all, stopped when it got to 'cis' lesbians and evol lesbian feminists.

What seems to have escaped the writer is that the reason it was formerly difficult to distinguish between lesbians and bi women is because women did not have independence or sexual autonomy. Very few women could survive without marriage, so it's virtually impossible to sit here hundreds of years later trying to guess which women having affairs were lesbians trapped in marriages or bisexual women who liked sex with both.

The era of second wave feminism and women's liberation, including women's sexual liberation, meant that lesbians started to be much more able to articulate and name their exclusive sexual attraction for women, as well as have the freedom to only pursue relationships with women. That started to make it pretty fucken' obvious which ones were the lesbians and which ones were the bisexuals.

I didn't even understand why she dragged butch/femme into the mess of an argument she was trying to make - that has always been something associated with lesbian culture, not bisexuals.

Edit: I finished reading it, because I'm a masochist. The gist of the argument seems to be: bisexuals have always hung around lesbians, therefore lesbians and bisexuals are indistinguishable, therefore lesbians don't own butch/femme, and a transwoman agrees with her so she's right. And the only reason lesbian-only culture/spaces existed in the 2nd wave was because evol radfems, not because feminism meant that tons of lesbians were suddenly able to come out of the closet and start their own communities.

But you can't expect much from someone who thinks they can fit the history of the evolution of lesbian identity into a twitter thread.