The Esci M60A1/M60A3/Blazer represents the high water mark for their 1/35 scale armor kits. Unfortunately for them, Tamiya released a 3 in 1 M60A3/M60A1/M60A1 RISE/passive kit at the same time. Tamiya's armor was top notch in the 1980s and Esci didn't have the same reputation, even though their M60A1/A3 series was better.
Italeri and then Dragon basically put Esci out of business in the late 1980s. Esci did a series of HMMWVs that were not as good as Italeri's. They did a series of LAVs that weren't as good as Italeri's. They did a Leo 2 that wasn't as good as Italeri's.
They did a series of BMPs that were better than Dragon's, but Dragon's T-72 series was better than Esci's T-72/74 and Dragon did a more complete line of modern Soviet armor. The Esci T-55 series remained well regarded for nearly twenty years though.
By the mid 90s rolled around, Esci was all but done in 1/35 scale armor. Italeri got their molds of the kits they didn't have in their line. Their LAVs, HMMWVs, T-72s, Leo 2, BMPs vanished.