Server-side programming languages and apps do not need to optimize "bundle" size as JS need to because client downloads (expensive and slow to download large js

Server-side programming languages and apps do not need to optimize "bundle" size as JS need to because client downloads (expensive and slow to download large js file as most internet usage now is via mobile phones) and executes the code (also slow as it need to be done on client every time). PHP often does not even need build system as we rarely use transpiling to older/newer versions because we don't have this problem of supporting different browsers. Package/file count does not have any meaningful impact of application speed