Dear arti...
Be no so sure
First the name you give are not really paramount in figurines design, they were the first yes, but ...
Stadden 54mm, even in 1972 when I begun were of poor quality, All the Queen were bigger size but poor sculpt, Hinchliffe and Caldercraft ( same production ) not to the level of today, Phoenix was one of the very best, Imrie lot of up and down with awfull horses, Vaillant had some very good sculptors in his staff, Chotta was very good in capturing perfect stances, Puchala was average, far better now, and nobody would be satisfied today with the level of Rose Miniatures .
Now, if you have a good look at the list, you will find at least 300 names of makers of 54mm metal in kit form, all of them at the minimum comparable level of Phoenix ( by the way, Phoenix are still availble ) and more 200 making resin with far more details than possible with the metal technique .
Nowadays, I still enjoy painting all the old stuff you named, I'm actualy painting some Rose, Lasset, Mokarex, Vaillant, Hinchliffe, Chotta .. and enjoy painting them .
I have the same pleasure when I paint, Romeo, Andrea, La Fortezza, Metal Modeles, El Viejo Dragon, First Guard, AItna, Aquila, Ares Mythologic , Berruo etc ...
It's also one of the reason why all shops selling metal kits dissapeared, in the 70 you could follow 10 to 20 makers and make stock, today you would had to follow 300 to 500 makers, nobody as the money to stock all that . So today you can not enter a shop and see the vast variety of products, you would need a parking lot in surface to show that . In the past, the best known shop in Brussels was only 100 square ft and everything was on display .
Also in the past with a shorter choice available, they sold by the 1000 almost each models, today when a company reach 500 pieces they are more than happy,and, when they reach 1000, the bells of all churches in the country are ringing at full peal .
Some supplier, mainly in resin, are making 100 sets max, and some busts only 20
A lifetime would not be enough to paint the present production .
Best
Michel