I think the AGP manufacturers have hit a cross-roads. 1980's everyone had a metal AGP. Anything vinyl was a kiddie blow up pool that lasted 1 season. Other the years, the vinyl has increased in quality. 12' round. Then got bigger and bigger as they found ways to make the vinyl strong enough. And the price point is cheap enough. And then on the metal side, the metal is getting thinner and thinner. Thanks China.
And then you have the internet and online shopping: I am putting up a AGP and stopped in 2 pool stores, looking for advice on filters, ladders, etc. BOTH stores basically told me, "yeah, we don't do much with AGP's, our business is with custom in-grounds....". And looking in their showroom, it photo after photo of incredible inground pools and $16K jacuzzi tubs on a special sale for "only" $12K. Yeah, ok.
I think Intex and the ability to basically buy a really nice decent size pool, online, delivered to your door, for the do-it-yourselfer to set up has totally changed the market.
Is there another vinyl brand other then Intex? I don't know of any at all. For many, to buy a pool for $400 to $700, and even upgrade the filter and and be done for a grand total less then $1000 is amazing. I think the smallest of metal AGP's start at like $1600 without pump/filter/ladder....