Germanic lineage arrived from the east?

[Jaska]

Then, what about the migration from Germany to Southern Scandinavia ca. 400 CE?

1. At the time of this migration from Germany to the north (ca. 400 CE), several Germanic branches were already clearly distinguishable from each other; Gothic was even written already during the 4th century CE. Therefore, if there was a language replacement Proto-Scandinavian --> Continental West Germanic, there should not exist any extant Scandinavian languages but northern dialects of Continental West Germanic in Scandinavia. And that is not the case in this reality.

2. Moreover, we know from the Runic inscriptions since ca. 100 CE that there was a gradual change from Northwest Germanic to Proto-Scandinavian to Transitional Scandinavian to Old Scandinavian. There are no signs of replacing the Scandinavian lineage with the Continental West Germanic lineage.

To conclude: undeniable linguistic evidence shows that no language replacement occurred in Southern Scandinavia following the migration from Germany ca. 400 CE.
(See also the end of my previous message concerning migrations and linguistic expansions.)