How long will it take for Linux desktop shares to surpass macOS? (12 months)

linux-overtake-osx.js

// data source: https://www.netmarketshare.com/operating-system-market-share.aspx?qprid=9&qpcustomb=0&qpsp=204&qpnp=13&qptimeframe=M
const osx = [7.87, 7.37, 6.92, 6.43, 6.74, 6.07]
const linux = [2.33, 2.11, 2.23, 2.18, 2.31, 2.21]

const changes = (list) => list.slice(1).map((share, i) => share - list[i])

const avg = (list) => list.reduce((accu, val) => accu + val, 0) / list.length

const linuxAvgChange = avg(changes(linux))
const osxAvgChange = avg(changes(osx))

const linuxCurrentShare = linux[linux.length - 1]
const osxCurrentShare = osx[osx.length - 1]

const linuxOvertake = (months) => {
	if((linuxCurrentShare + (months * linuxAvgChange)) > (osxCurrentShare + (months * osxAvgChange))) {
		return months
	} else {
		return linuxOvertake(months + 1)
	}
}

console.log('Linux overtakes macOs:', linuxOvertake(1))