So to say bitcoin can't keep up transaction wise is to forget what bitcoin is, at it's core...code.  The blockchain is programmable and has been "updated" "enhanced" whatever you want to call it by elite cryptographers/Dev team ..and one of those geniuses is a mod here so I will quote from a recent article that discusses his work (Greg Maxwell and if Greg happens to see this post, congrats on the award!)

"As open-source software, Bitcoin relies on voluntary contributors to maintain, review, and improve its codebase. Unlike a traditional company, bitcoin has no central authority, making the work of developers like Wuille and Maxwell critical to its continued success. Both have played pivotal roles in ensuring bitcoin remains robust, secure, and a practical tool for financial freedom.

“Wuille and Maxwell’s efforts have demonstrably made bitcoin a practical human rights tool for millions of people, especially so many who labor under authoritarian regimes and financial repression across the globe,” the Finney Freedom Prize announcement stated.

Their contributions have helped bitcoin become a powerful financial resource for individuals worldwide, particularly those in repressive environment". - https://bitcoinmagazine.com/press-releases/pieter-wuille-and-gregory-maxwell-receive-the-finney-freedom-prize

Mass adoption is somewhat already here..with ETFs , love or hate em, it's changed the game.  Just look at how stable btc's price has been throughout this craziness in the US/stock markets for months now.  IMO bitcon HAS already succeeded.  I transact w/it often. Always will.  Others will as well and more will follow.