To some, this poses a problem – why the silence post Parousia? – what happened after AD 70? Could such apparent or awkward "silence" be explained thus:
Judg 2:10 Moreover, in time death overtook all that generation; and there arose another generation after them, that did not know [recognise, understand] the LORD, nor yet the work which He had wrought for Israel.
Psa 78:42-43 They did not remember His power: the day when He redeemed them from the enemy. When He worked His signs in Egypt, and His wonders in the field of Zoan.
As it was for Israel post-Egyptian bondage, so might it have been for new covenant Israel when they came out of Sin-Death bondage in AD70, within a generation some forgot the work that God had wrought for them.
Or, could it have been that "Christians" who in that time were predominately viewed as a sect within Judaism, and that due to the whole-scale destruction of practising Judaism throughout Palestine in the Roman-Jewish wars, that the Church as it was in its infancy fell into a self-protective and preservative silence.
Or perhaps one further thought might suffice – a simple explanation as to the apparent, and yet frightful to some "silence" post Parousia might simply be that of REALISED REDEMPTION – all was complete – there was nothing left to say. Whether it was realised or not, in the Cross-Parousia event humanity had been fully redeemed and reconciled back to God. Yet it has been man-meddling "religion" on the other hand following on somewhat later, that taking a while to gather up her feet has delivered to us what we know of her today.