Yeah, Bitcoin needs better privacy. Just ask Roger Ver. If Bitcoin gets mimblewimble it will be hard to justify monero
Discussion
It'd be better to advocate for a z-side (zcash sidechain/drivechain) than for MWEB as mweb has worse privacy and is harder to get into the consensus, but at any rate Liquid already has confidential txs but has 0 txs per block, (1 being the mandatory coinbase tx https://liquid.network), so in a privacy sidechain/L2 world, split coins create small anon sets which is a world where XMR is still undefeated