Advantages of beryllium?

I run TADs and BE does have advantages its lighter stiffer has high resonate frequency before material breakup. But its highly toxic sure as a user you most likely will not BE exposing yourself family or pets to BE poisoning but maybe the place were its mined did or maybe the miner maybe the factory worker maybe anyone handling it in the future. So to me if you want BE buy vintage dont support modern production of BE drivers in things as disposable as a modern loudspeaker.

Does seem one poster has no idea what a TAD driver is  http://www.technicalaudiodevices.com/pro-hf-units/  and he seems to suggest vintage doesn't perform as well as modern I suggest he point me towards a BE equipped modern driver with better specs than a TAD? 

https://www.madisoundspeakerstore.com/air-motion-transformers-amt/mundorf-amt25d6.1-r-dipole-air-mot...    https://www.madisoundspeakerstore.com/soft-dome-tweeters-morel/morel-titanium-supreme-tsct1104-tweet...  https://www.madisoundspeakerstore.com/ribbon-tweeters/raal-original-140-15d-ribbon-tweeter-with-amor...          in my own hands on experience these options sound better than BE options from SEAS ScanSpeak and Satori   

kosst_amojan still waiting for you to point out a modern BE compression driver with better specs than TAD? But maybe all you had was a rude reply and ignorant comment.   And for the rest this maybe of interest http://www.audioxpress.com/article/Voice-Coil-Spotlight-The-Beryllium-Advantage

Kosst is not very knowledgeable but he will give opinion without fact and without experience if you ask him to prove his BS reply’s he has nothing but weak insults. Guys a joke ignore his trolls.