This has been discussed in some detail in previous threads ... here's one link:
https://goscf.com/t/21906&SearchTerms=bufferedThe bottom line is that most people would find truly archival quality paper (as in ISO 9706 certified archive grade alkaline buffered paper) to be cost prohibitive for most stamp collections, as the paper can easily exceed $60 per package. As a practical matter, long term archival qualities that demand paper of this type is typically for museum pieces that are looking to last upwards of 300 years without deterioration. For most stamp collectors, that equates to more generations than many stamps will ever last, so it's not money well spent if you're just looking to mount and store an average collection throughout our lifetime (or perhaps even our children's lifetime).
Judge for yourself. Obviously, anyone is free to use whatever paper they so choose, but if this were an all important subject, one must consider that no commercially produced stamp album that I know of has ever used this type of paper and to my knowledge no one has lost a stamp collection because of it.