Failed introduction though if it did not take off 😉. The point was not on who was first to use it; but the fact he wrote a specifc treatise on the subject arguing/promoting its use (De Thiende in 1585). His system did not even use a point but explicitly mentioning the value of the number possition.
So 1.234 would be 1(0)2(1)3(2)4.
Which was rather clunky but i gues it made it clear what he was doing.