I collect them cos of their artwork/effects, in fact the recent releases have seen great improvements in that aspect.
Artwork: Still great/unique
Effects: Even better now
Colours: Richer
Feel: Way better than plastic
Spines: Same awesome spine
Only difference is now there's more releases. If there's too many, just buy those you really like and those steelbooks will make a great part of any collection.
If you appreciate steelbooks then there's no better time than now. If you did it for some other reason, then yeah you're fucked