I'm trying now to compile with the latest Arduino engineering release RC1
framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32#2.0.0-rc1

But compilations fails with this error

c:/users/dimake/.platformio/packages/toolchain-xtensa32s2/bin/../lib/gcc/xtensa-esp32s2-elf/8.4.0 ...

In a recent days a new version of PlatformIO/Espressif32 was released:

Updating platformio/espressif32 3.3.0 [Updating to 3.3.1]
Platform Manager: Installing platformio/espressif32 @ 3.3.1
Unpacking [####################################] 100%
Platform Manager: espressif32 @ 3.3.1 has been ...

I struggle with similar issues as you and played with DIO/QIO as well.
When you define in platformio.ini flash_mode as QIO it compiles and works (at least somehow), if I compile with DIO then my LittleFS or SPIFFS can't be mounted.
So, I compile with QIO (until a stable framework release).

On ...